Throttle Position Sensor (TPS) Tester - 2201519-A This tester allows the use of a digital multi-meter to test TPS function as well as perform the TPS adjustment. replace the sensor, maybe. A lot of people don't test the ACUITY Hall Effect Throttle Position Sensor for 02-05 AcuraRSX-S and 02-05 Honda Civic Si and when they get it home it's broken and won't work. Throttle Position Sensor setting procedure for Moto Guzzi California and Bellagio set to 3. If your throttle body is defective, you may not be able to repair it yourself. I got a check engine light, trouble code was for idle low RPM. Under most circumstances, it will relearn after just driving the car for a while, but if your car continues to experience an abnormal idle, or you just don't want to wait for it to relearn on its own, you can try this procedure. The throttle body for the Infiniti G35 is known for carbon buildup, and requires regular, light cleaning to maintain peak performance. (DO NOT ground the TPS on the engine or anywhere else!). The original battery died the other day, and after replacing it and following the instructions in the manual to let the computer re-program, it seemed like the idle is way too low. Remove the intake manifold cover. What are signs of a bad Throttle Position Sensor?. If you have some rough idling issues in your 86-04 Mustang, especially after replacing your throttle body, then you may need to replace or adjust your Throttle Position Sensor (TPS). when driving it's like being on cruise control. This will clear the memory off of the trouble code and make a readiness code. If I unplug the throttle position sensor the idle drops down to where it's suppost to be and I am able to shift out of park but the check engine light comes back on. You might have to replace the throttle body. This article covers troubleshooting diagnostic trouble codes (DTCs) P0121, P0122, P0123 on Dodge 3. Mercedes-Benz dealerships would be happy to help you or any Indepdement mechanic. Sometimes the DPFE sensor hoses could be reversed during a repair and this also could cause the code P0401. Leaking fuel injectors can cause a lumpy idle (along with high fuel use, lower power, and higher regulated emissions). Beware when you clean or replace the Throttle Body. It will not idle correctly. Idle Speed appears to fluctuate because Tachometer jumps around at idle - A fluctuation of +/- 50 rpm is normal because the computer periodically samples the engine speed and then updates the tach. The Jaguar Throttle Position Sensor reads readings concerning the position of the flat valve in the throttle inside your car's engine and sends it to the electric control unit. 5 degrees too much which caused a rough idle with the BC cams. If it seems to idle fine and run okay with the new sensor, leave it. The throttle position sensor, TPS for short, is a sensor that is used in an internal combustion engine. The throttle position sensor is located near the throttle body itself. The idle may be unstable or a DTC may set if the throttle position is not learned. I just have done the ETV relearning on an Axio 2012 with 1NZ engine. 4% whether its idling high or not. With or without a distributor, erratic idle (including high idle speeds) can be caused by a faulty throttle position sensor (TPS) - a common problem (see diagnostics below). Now I have a. A servomotor moves the throttle to the desired position, and redundant throttle position sensors report the results. This position can vary from model to model of riding lawn mower. Simultaneously, throttle position sensors let the PCM know how much the throttle has moved. 9L pick ups, vans and SUVs. 1A Auto has a large selection of aftermarket Throttle Body Position Sensors for many makes and models, and ground shipping is always free!. 6L engine, this article is intended to help you understand how the ISC (Idle Speed Control) system should work and how it may fail (my experience). It converts electrical resistance (zero to 5,000 ohms scale, ±25%) to a voltage that the computer interprets when setting ignition timing, fuel mixture and idle speed. Chevy Cobalt is stuck on high idle. Throttle Body Cleaning: Cleaning the TB without removing the intake pipe. The Toyota 22RE engines use a "Linear" throttle position sensor. The readings should smoothly increase from 0 at idle to 750 (or 0% to 100%). This article applies to the Ford F-150 (2004-2014) and F-250, F-350 Super Duty (2005-2014). 4% whether its idling high or not. It's not uncommon for cheap aftermarket sensors to fail soon after being replaced. The car with EPB replace brake pads √ Electronic Parking Brake release Throttle programming √ Used to clear the learning value after cleaning the throttle, otherwise it will cause high idle speed. 2) Remove these 3 10mm bolts and then remove the throttle body cover. yea this SUV is designed to do that, i'm gonna have the coolant sensor replaced as well, it's probably due for a replacement, just like the radiator and thermostat if you would have saw how they. just clean throttle with spray and replace tps if no change when unplugged and clean idle valve or replace if codes. Or you can replace the throttle position sensor yourself to save money. After replacing the battery, my air conditioner and heater controls no longer work. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc. 4% whether its idling high or not. If your throttle body is defective, you may not be able to repair it yourself. It was because I had my cam gear retarded 0. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. If action is necessary then replace the oil level sensor on the affected vehicles. The electronic control module determines the controls the throttle plate and fuel control valve to provide the correct air/fuel ratio based on driver demands. SENSOR THROTTLE POSITION. On models. So removed the throttle body and cleaned it up. Since I replaced it the engine now idles at 1100 RPM at first start and, after I drive around and then put the vehicle back in park, the engine idles anywhere from 1500 to 2000 RPM. Battery matching √ After the battery is changed, you need to match the battery. The two metal prongs under the TPS move when the throttle is pressed. The Toyota 22RE engines use a "Linear" throttle position sensor. So I am having the typical problems associated with a dirty throttle body/TPS sensor of the tranny shifting very hard into all gears. Replacing a Throttle Position Sensor on a Jeep Wrangler: It's always best to do any work yourself, then you can be sure it was done right, plus it will save you a considerable amount of cash. It's not uncommon for cheap aftermarket sensors to fail soon after being replaced. Only once did it surge really high to the point where i had to cut it off thinking it might blow up. If you have a CEL with a MAP sensor code and a fluctuating idle, address the idle issue first, reset the code, and see if the MAP sensor code comes back. I have installed a new IAC sensor, the operating temp is within specification. 2 volts but not too high (over 1 volt). They could not tell me a specific problem other than POSSIBLE bad throttle chamber, TPS, or throttle body, OR bad ECU. replace the sensor, maybe. My bet is that it won't come back after you get the idle problem solved. I have a Mitsubishi Pajero 3. Disconnect the intake air temperature (IAT) sensor connector (A), and remove the breather hose (B), then remove the air cleaner housing (C). Other possible causes include: TPS not securely mounted; Faulty TPS; Dirty Throttle Body (or carbon-filled). Upgrading the original throttle body to a larger one can allow for more horse power to be made. new clean air, filter maf clean and make sure there is no opening , loose, fitting in the duct, breather, from the air filter to throttle. Throttle programming √ Used to clear the learning value after cleaning the throttle, otherwise it will cause high idle speed. I don't think it does but read I should shoot some carb cleaner to check. I only have this problem when sitting at idle for a couple of minutes, then it starts to drop slowly then stall. Don't sweat it. An incorrect part throttle indication at idle will prevent entry into closed throttle rpm control, and could result in a high idle. Dodge Dart 1. ECU programming √ The car with EPB replace brake pads √ Electronic Parking Brake release Throttle programming √ Used to clear the learning value after cleaning the throttle, otherwise it will cause high idle. They could not tell me a specific problem other than POSSIBLE bad throttle chamber, TPS, or throttle body, OR bad ECU. 55 V for more than 0. Or you can replace the throttle position sensor yourself to save money. Utilize the ‘Service Menu’ of the Dealer Communication System, and based upon the response of the system either proceed with corrective action, or take no action at all. The Throttle Position Sensor (TPS) is a potentiometer attached to the throttle body which notifies the ECU about the position of the throttle. This sensor is turned by the throttle, so look for it where near where the throttle cable connects to the accelerator linkage under the hood. the Throttle Position. seems to be. Airbag reset √ Used to clear airbag ECU collision data after a vehicle collision, otherwise the ECU cannot be reused TPMS reset √. A few months after replacing the TPS, I noticed the check engine light on again, and a slightly higher idle than normal, around 1000rpms at normal operating temperature. Or you can replace the throttle position sensor yourself to save money. After that I disconnected the smaller coolant hose and then the throttle body was completely off. I need to replace the throttle position sensor on my '03 Sentra SE-R Spec V 2. Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. We replace a fuel pump, range sensor in the tranny but it still stalls at the first light off the interstate. The Jaguar Throttle Position Sensor is an important component that translates the tilt of the throttle valve into electric signals so it can be used by the ECU. This causes the idling speed of the engine to change as needed. Throttle Position Sensor (aka throttle pot) This sensor provides the ECU with data regarding the position of the throttle butterfly plate (i. Idle Speed appears to fluctuate because Tachometer jumps around at idle - A fluctuation of +/- 50 rpm is normal because the computer periodically samples the engine speed and then updates the tach. Anyone have any problems with their TB after replacing the battery? After replacing new battery, drove off and turn on A/C and RPM began to drop significantly and eventually stalled on me. It would rev at this point (in park). 4L No Start VIN: 1FTRW08L91 Fellow Technitions, Thank all of you who gave a reply to this post. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. Trouble codes: 118 (engine coolant temp sensor), 123 (throttle position sensor). One test that I have done is tried to plug the hole that leads to the IACV in the throttle body with my finger (the one in front of the throttle plate) and the idle does not change. All parts are bosch/OEM Parts. In many instances, stalling ends up being an idle control motor at its limit or a failed motor. I unclamped the big coolant by-pass hose first and then pulled the throttle body off. Monitor the engines temperature by observing the temperature gauge. If the voltage skips as you tap the sensor, replace it. 4L V6 equipped car (Buick, Chevrolet, Oldsmobile, Pontiac). It consists of mechanical parts which may become worn and require replacement. Or, it's possible there is a problem with the new oxygen sensor (or wiring). 7L throttle position sensor IP: Logged Message: I have 2000 QC 4. BMW E36 TPS Variable Throttle Position Sensor Kit For Mazda MX-5 NA 1. It stored codes 21 AND 22, meaning that TPS signal voltage was both high and low. Properly adjust the idle speed first. Check for a binding throttle cable. 7 has been having a high idle, like around 1200. I changed the MAF sensor, idle air control and finally the throttle position sensor a few weeks ago. The following symptoms can be caused by a faulty IAC due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit. Need to replace your defective Mass Air Flow (MAF) Sensor? Then shop at 1A Auto for a high quality, aftermarket Air Flow Meter replacement for your car, truck, SUV or van, at a great price. I noticed as car is running if the gas is pressed the throttle body does not open. This time the second one seems to be working fine, it has been 1 week so far and I am hoping. Stumble or miss at operating speed - The ECT and IAT sensors must be accurate or the injection timing will be wrong. 4L) This article will take you step by step thru' the testing and troubleshooting of the throttle position sensor on your GM 3. Here's what the main side of the throttle body looked like closed, not so bad. This causes the idling speed of the engine to change as needed. You can use feeler guages to set it correctly, but since not everyone has them, and I like quick, watch the backprobed wire for zero volts while you adjust the throttle position switch. I drained the transmission and transfer case. So here, in a nutshell, is how the TPS on your Ford or Mercury or Mazda car (pick up, mini-van) works when you crank and start it: The fuel injection computer supplies 5 Volts and ground to the throttle position sensor. Throttle Position Sensor (TPS) Tester - 2201519-A This tester allows the use of a digital multi-meter to test TPS function as well as perform the TPS adjustment. Set your scanner to display the relative throttle position (Throttle position relative closed throttle) and then slowly depress the accelerator. In this case. What the Home Mechanic Needs to Know about O2 Sensors Download PDF. So I bought a code reader to determine the issue and it read 12 (system cannot raise engine speed above normal idle) and 63 (throttle position sensor signal voltage is too low). The Jaguar Throttle Position Sensor reads readings concerning the position of the flat valve in the throttle inside your car's engine and sends it to the electric control unit. Stalling at stop lights. 27 Injector No. SOLVED - Engine Failsafe after Valve Cover Seal Replacement for Blue Smoke. If not, head down to the dealer and see if they can do an idle learn for you. The camshaft position sensor may fail when the engine is hot - this may cause the 'check engine' light to illuminate, variable idle speed, reduced engine power, intermittent stalling and the vehicle not to start. It ended up being that they were found in a storage unit bought during an. ISC (Idle Speed Control) Troubleshooting, Replacement, Repair. unbolt the throttle body, pull it up a little to make it easier to get to the plugs and hoses unplug the TPS (throttle position sensor) and IAC plug then remove the vacuum lines , throttle cables removing the IAC from the TB can be difficult because it has phillips screws, a hammer operated impact driver works to get these off. It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit "Throttle Valve Closed. 5-03 and some TPS / APPS Throttle Position Sensor Dodge Cummins 98-04 2 new screws are provided. On some vehicles it may not do much damage. Issue Ford Motor Company has “consolidated” high and low content harnesses to make the service selection easier, and to reduce the number of harnesses required for service. Wouldn't hurt to take some MAF sensor cleaner to it and also clean out your throttle bottle. I didn't want to move the idle adjustment because it didn't constantly idle too high, it actually would go as low as only around 600-700rpm's even while in drive. IAC problems (never threw a code) were all solved. Procedure 4 Throttle/Idle Learn Description The engine control module (ECM) learns the idle position of the throttle plate to ensure the cor- rect idle. Lastly (I promise), don't rule out a mechanical issue. By Ross Kuhre (Stock 93 MX-5, C package, 130k mi). view details. If you have a 94-97, clean the MAF sensor with an approved cleaner. Starting in early 2000’s, many car makers including Ford started installing fly by wire electronic throttle bodies. Toyota and Lexus rough idle after battery replacement A common concern DIY Toyota and Lexus owners call CARspec for is a rough idle, starting and dying, or a hard start just after replacing or disconnecting the 12 volt starting battery. Some older style throttle position sensor are adjustable, but most newer style sensors are fixed position. Alternatively, the throttle body sensor itself can be replaced or readjusted. 25 Target Idle Not Reached (plus or minus 200 RPM). It is a much more frequent occurrence on motorcycles where the TPS is mounted in a position where it is exposed to water and physical damage (i. You may also have a failed TPS. If you have crankshaft sensor issues, the ECM can't synchronise fuel injection, spark ignition or control variable valve timing. 0L ( XJ ) limited trim. Sometimes the DPFE sensor hoses could be reversed during a repair and this also could cause the code P0401. Won't Idle Correctly After Attempted Repair-What Next I have a 2000 Jeep Cherokee 4. Erratic idle: As above Bad oxygen sensor. If the device does not work, the car computer can lose all its information and it will cause the car to hesitate or stall. This is all best left to a professional mechanic who can provide you with a diagnosis, and then install the correct replacement part. ) On 2001+ M54 & M56 P1397 B (exhaust) Camshaft Position Actuator (faulty reference value). The throttle position sensor is located near the throttle body itself. Average repair cost is $260 at 101,900 miles. ) and a bad throttle position sensor. It is easy to remove from the throttle body via the two screws, don't forget to remove the wiring's connector. A few months ago I posted a message about an idle problem I was having. Procedure 4 Throttle/Idle Learn Description The engine control module (ECM) learns the idle position of the throttle plate to ensure the cor- rect idle. If the problem persists, then the throttle motor or throttle position sensor may have been damaged when the cleaning occurred. Easily > £500 for about 4 hoses. Ford E-series Throttle Body replacements that include a new Throttle Position Sensor may cure a drivability problem, but on vehicles with a PennTex heavy-duty high amperage alternator already installed a new problem may occur that makes the throttle body change seem ineffective. I have tried bleeding the IACV, replacing the IACV, replacing and adjusting the throttle position sensor, replacing the entire gauge cluster (which had the same issue, but seemed to change the high idle RPM weirdly enough, but still wonky-high). Also see:---> Unusual idle after cleaning MAF and throttle body---> My High Idle CURED!!!. If I unplug the throttle position sensor the idle drops down to where it's suppost to be and I am able to shift out of park but the check engine light comes back on. As you're probably already aware, the throttle position sensor on your Nissan is two sensors in 1. The TPS itself is simply a linear variable resistor that when driven by the ECU produces a linear voltage in a 0-5 volt range, 0 volts being idle and up to 5 volts representing. Separate the exhaust. You might have to replace the throttle body. Make sure the throttle and/or choke is in the proper position. It took several attempts to restart it. When to perform idle air volume learning z After replace IACV-AAC valve, throttle valve body or ECM z While idle speed or ignition timing is out of the specifications Prerequisites. Reset throttle position sensor idle position memory. The Throttle Position Sensor (TPS) is a potentiometer attached to the throttle body which notifies the ECU about the position of the throttle. We cleaned the throttle because of and engine light code P0121 on the scanner. Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. Disengage the wiring harness connector. Probably the most common occurrence of a high idle concern is after cleaning the. We will also walk you through the replacement process. If the device does not work, the car computer can lose all its information and it will cause the car to hesitate or stall. If one or more of these are out of adjustment or if the TPS is noisy, shifting will be erratic. Because the idle didn't change after the IAC reset, I will first turn the idle stop screw back to it's original position and reset ECM as a precaution. Now I have a. Make sure the throttle and/or choke is in the proper position. Disconnect the TPS coupler. My trouble is finding it. First off 2007 Silverado 4. Since the check engine light (CEL) illuminates due to a variety of reasons, it's entirely possible the o2 sensor replacement did fix one problem and a new one has popped up. We added the exact amount called for, how can this be?. As above Hard to fix, get a replacement. Some of you will notice I mainly focus on systems with bypass valves, feel free to chime in about electronic throttle systems. 27 Injector No. Then tighten the lock nut. Engine Control Module Fault Code for Throttle Position Sensor Model:. After evaluating the codes I decided both the MAF and O2 sensor were shot. Mercedes-Benz dealerships would be happy to help you or any Indepdement mechanic. Remove the front engine mount nuts (Figure 2). TPS malfunction and failure is much rarer on in-line engined. 7 has been having a high idle, like around 1200. If nothing you do gets you 0. Throttle Position Sensor There is an idle learn procedure when the dealer puts them on that is done. I changed the Mass Air flow sensor,and the throttle position control. It falls to about 5-600 and then catches itself right before it dies. They are a direct bolt in replacement on a 24V 98. GM Sensors have traditionally been outsourced to overseas manufacturers, the same ones who supply throttle position sensors to other makes like Ford and Toyota. IAC problems (never threw a code) were all solved. 2) After 3. Here's what the main side of the throttle body looked like closed, not so bad. Leaving throttle plate just slightly open will effect ur idle (high or surging idle) which cannot be controlled even by Idle Adjust Screw. If you ship your injectors to. In a similar fashion, if there is carbon build up in the throttle body and the. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. Reassembled it and got a extremely high idle immediately on start up. Make sure the throttle and/or choke is in the proper position. Your IAC may be functioning correctly and the PCM is adjusting idle speed based on other sensor inputs during closed loop. And a new starter assembly. After about 5 or 6 times of doing this the throttle plate would open fully in less than a second when the accelerator was pressed to the floor and also fully close when released. Possible Causes: 1. 27 Injector No. The throttle body has base settings and reading from the throttle position sensors that should not allow this type of idle speed. 55 V for more than 0. N8 (Aluminium Throttle Body) Part No 1635. BTW the procedure was implemented by another authorized dealer (who obviously knew what he was doing). Chevrolet Silverado 2007-2013: How to Replace Throttle Body Your Silverado's throttle body is an air-intake butterfly valve that regulates air flow. Now that we are already aware of how a throttle position sensor facilitates the engine to adjust the correct amount of fuel in the vehicle so that it feeds the right data to the computer time and again, a slight malfunctioning in the sensor creates a host of problems. on R-series). The TPS is used to monitor the position of the throttle butterfly valve. When replacing the ICV I found the left hose had a crack at the opening. I suggest that you turn the ignition on but don't start the engine. Test and adjust the Throttle Position Sensor. After cleaning the throttle body, many owners notice a very high idle, erratic (bouncing) idle, and unpredictable power surging. TBA/TPS Throttle Body Alignment Reset. Well, this article in its simplest form has showed you the lucid steps to clean a throttle position sensor in a car! All the best and work safe!. (if sensor has been replaced multiple times for this fault code, the VANOS actuator is likely the cause. I changed the Mass Air flow sensor,and the throttle position control. An OBDII code checker identifies defects in the exhaust system of the car. 24 Throttle Position Sensor Voltage Low. P0223 - Throttle/Petal Position Sensor/Switch 'B' Circuit High Input P0122 - Throttle Position Sensor/Switch A Circuit Low Input. Before you buy expensive new or refurbished fuel injectors let us help you take care of your fuel injector problems. If for any reason a failure is sensed, the system will go into one of three failure modes, Scott explained. In this case. However, this morning the CEL finally came on for about 10 seconds, then turned off. If you have crankshaft sensor issues, the ECM can't synchronise fuel injection, spark ignition or control variable valve timing. If you have some rough idling issues in your 86-04 Mustang, especially after replacing your throttle body, then you may need to replace or adjust your Throttle Position Sensor (TPS). Any abrupt change in the line during the test is an indication of a bad throttle position sensor. If your TPS sensor has turned on the check engine light, you may need to clear it with a scanner. The throttle position sensor is one of the most crucial components of any fuel injection system, right after the computer and fuel injectors in terms of importance. Dirty throttle plate- clean with carb cleaner and/or dirty maf sensor- clean with electrical contact cleaner or bad throttle position sensor-replace. Once the idle is reading correctly recheck the idle. Often a throttle position sensor (TPS) is connected to the shaft of the throttle plate to provide the ECU with information on whether the throttle is in the idle position, wide-open throttle (WOT) position, or somewhere in between these extremes. sate for it so it can control the throttle plate accordingly. 1)Change the primary O2 sensor (Oxygen Sensor) 2)Test the TPS (Throttle Position Sensor). Some older style throttle position sensor are adjustable, but most newer style sensors are fixed position. I had the throttle body cleaned and it went away. Equipment Needed: The following tools are needed: Flat bladed screwdriver. 25 Target Idle Not Reached (plus or minus 200 RPM). Could be that it is telling the computer to increase the idle to keep the engine running at idle but im not sure on that one. Put the ECU in diagnostics mode and check for any errors. I have removed the throttle body and inspected for damage and or any obstructions, and or a clogged muffler. Dont attempt to buy from Online auto parts house! They will not fit!!!!. Well, this article in its simplest form has showed you the lucid steps to clean a throttle position sensor in a car! All the best and work safe!. A local mechanic recommended replacing the Throttle Position Sensor (TPS) so I did. We replaced the throttle sensor, fuel filter and pump and check for leaks. Now that we are already aware of how a throttle position sensor facilitates the engine to adjust the correct amount of fuel in the vehicle so that it feeds the right data to the computer time and again, a slight malfunctioning in the sensor creates a host of problems. Since the check engine light (CEL) illuminates due to a variety of reasons, it's entirely possible the o2 sensor replacement did fix one problem and a new one has popped up. Check Price: Mercedes Throttle Position Sensor. The Toyota 22RE engines use a "Linear" throttle position sensor. In this tutorial, I'm gonna' show you how to test it and how to adjust it (if you need to replace it). Idle Speed appears to fluctuate because Tachometer jumps around at idle - A fluctuation of +/- 50 rpm is normal because the computer periodically samples the engine speed and then updates the tach. And a new starter assembly. If at all possible, I try to do all required minor repairs to any of our out of warranty vehicles. However, everything in a car that determines air fuel mix has effects on fuel economy. I didn't want to move the idle adjustment because it didn't constantly idle too high, it actually would go as low as only around 600-700rpm's even while in drive. When a throttle position sensor goes bad, your vehicle may stall or run rough at idle, and may stumble upon acceleration. Probably the most common problem that causes idle problems in multiport fuel injected engines is a carboned-up throttle body. Then we got a new instrument cluster and installed it. I advanced it from -4. Here are some common symptoms of a bad or failing throttle position sensor to watch for: 1. I have also read that regular cleaner would work on the mass air flow sensor as well, but its pretty expensive if something damages it and the cleaner for it was pretty cheap in comparison. Properly adjust the idle speed first. Remove the front engine mount nuts (Figure 2). sate for it so it can control the throttle plate accordingly. 3) Remove the 2 screws and then the TPS. Yesterday i took air cleaner off and throttle position sensor out that is located on top of the throttle body and cleaned with carb cleaner. The car had rough idling, even engine stalled. If the problem persists, then the throttle motor or throttle position sensor may have been damaged when the cleaning occurred. Throttle Body Cleaning: Cleaning the TB without removing the intake pipe. Also see:---> Unusual idle after cleaning MAF and throttle body---> My High Idle CURED!!!. Other possible causes include: TPS not securely mounted; Faulty TPS; Dirty Throttle Body (or carbon-filled). Learn about this problem, why it occurs, and how to fix it. In the past, most mechanics ended up having to replace the speedometer head when a vehicle came in with a broken speedometer. Also, in what is possibly a red-herring, these problems started immediately after taking it through a high-pressure automatic car wash. 46 volts at idle and between 4. When a throttle position sensor goes bad, your vehicle may stall or run rough at idle, and may stumble upon acceleration. Set your scanner to display the relative throttle position (Throttle position relative closed throttle) and then slowly depress the accelerator. depicted in the chart below. ) On 2001+ M54 & M56 P1397 B (exhaust) Camshaft Position Actuator (faulty reference value). If the code resulted from high blowby in the engine, and the engine’s compression ratio is out of range, then you need to replace the throttle valve control. 7L TBI - PPoor runing engine- Please Help Sign or the throttle position sensor. It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit "Throttle Valve Closed. Replacing the MAF completely cured the driveability issues, but the idle surge remained. I have removed the throttle body and inspected for damage and or any obstructions, and or a clogged muffler. None have made a difference. Now with the new TB, in P and N it revs at about 950-975 RPM. Over time as your throttle body collects carbon the air volume which passes through it changes very slightly. The throttle body for the Infiniti G35 is known for carbon buildup, and requires regular, light cleaning to maintain peak performance. 3) Remove the 2 screws and then the TPS. - After the 2 minutes, run engine at idle speed, with no applied load for 6 minutes (Air conditioning OFF, no throttle movements, no vehicle movement, etc). My Chevy Malibu has a very high idle. That's what my car did when I had my Corsa. This time the second one seems to be working fine, it has been 1 week so far and I am hoping. If you have an idle problem with the unmodified NA 1. - After the 2 minutes, run engine at idle speed, with no applied load for 6 minutes (Air conditioning OFF, no throttle movements, no vehicle movement, etc). I only have this problem when sitting at idle for a couple of minutes, then it starts to drop slowly then stall. ECM not reading any voltage - so you might have an open 5 volt supply to the Pot, loose connector, broken part. If you didn't have this high idle problem before the throttle body motor replacement, you need to start by returning the throttle body and getting another one. If your throttle body is defective, you may not be able to repair it yourself. 8L or GSi Model. If I push on the throttle plate to push it more in the closed position, the idle does drop a little bit. Here's what the main side of the throttle body looked like closed, not so bad. GREG'S BOSCH L-JETRONIC FUEL INJECTION IDLE ADJUSTMENT, DIAGNOSTIC AND TUNE UP PAGE, Latest revision Sept. Under most circumstances, it will relearn after just driving the car for a while, but if your car continues to experience an abnormal idle, or you just don't want to wait for it to relearn on its own, you can try this procedure. High idle I've replaced a couple cracked hoses and will probably disassemble the intake manifold to clean the throttle body, ICV and replace whatever other hoses are down there. ISC (Idle Speed Control) Troubleshooting, Replacement, Repair. just clean throttle with spray and replace tps if no change when unplugged and clean idle valve or replace if codes. They could not tell me a specific problem other than POSSIBLE bad throttle chamber, TPS, or throttle body, OR bad ECU. In most cases, this code is not very difficult to diagnose.