Question about Chevrolet C1500

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(HIGH IDLE) ENGINE WILL IDLE @ START UP ONCE ACCELERATOR IS DEPRESSED AND RPM'S REACH ABOVE 2000 VEHICLE REV'S @ 3+K RPM

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This sound like you need to replace your throttle position sensor.

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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How to reset ECU,Throttle and Accelerator Position Learning


Hi.

Below the procedure to reset ECU,Throttle and to perform Accelerator Position Learning on Nissan. It works on Titan, Altima, Infinity, pathfinder and other models.

ECU Resetting


While performing the procedures below, ensue that you are respecting the times stated. If the steps are not done within the specified times, the module will not reset. You will need to use a watch or a chronograph while performing the procedures.

Procedure:

1. Ensure that the accelerator pedal is fully released, set ignition switch to the “ON” position, then wait 3 seconds.
2. Follow the steps a and b below, repeat the two steps in sequence quickly for five times within 5 seconds.
a. Push hard the accelerator pedal untill fully depressed.
b. Release the accelerator pedal in full.
3. Wait 7 seconds, then depress the accelerator pedal completely, and hold it for about 10 seconds until the CEL (check engine light) starts blinking.
4. Release the accelerator pedal while the CEL is still blinking.
5. Wait 10 second.
6. Depressthe accelerator pedal in full and hold it for 10 seconds or more.
7. Fully release the accelerator pedal while the CEL light keeps flashing.
8. Turn the ignition switch to “OFF” position and start the vehicle. If procedure has been done correctly, then the light light will turn off.
If the light continues to stay on, repeat the procedure.

Accelerator Pedal Release Position Learning

Procedure

1. Ensure that the accelerator pedal is completely released before starting the procedure.
2. Turn the ignition switch “ON” and wait at least 2 seconds.
3. Turn the ignition switch “OFF”, and wait at least 10 seconds.
4. Turn the ignition switch “ON” and wait 2 seconds.
5. Turn the ignition switch “OFF” and wait 10 seconds.

Throttle Valve Closed Position Learning

Procedure

1. Ensure that accelerator pedal is completely released.
2. Turn ignition switch to the “ON” position.
3. Turn ignition switch to the “OFF” position and wait at least 10 seconds.
Ensure that the throttle valve moves after turning the switch off.

Idle Air Volume Learning (Throttle Position Learning)

Procedure

1. Follow the Accelerator Pedal Released Position Learning described above.
2. Do the Throttle Valve Closed Position Learning also described above.
3. Start the engine, and allow warming up.
4. Turn the ignition on “OFF” positionand wait 10 seconds.
5. Ensure that accelerator pedal is fully released, then turn the ignition switch to “ON” position, and wait 3 seconds.
6. Repeat the steps a and b below five times within 5 seconds in sequence.
a. Push hard the accelerator pedal untill fully depressed.
b. Release the accelerator pedal until reaching full extension.
8. Wait 7 seconds or more, depress the accelerator pedal completely and hold the pedal down for about 20 seconds until you see that the Check Engine Light stops blinking and starts getting steady..
9. Rrelease completely the accelerator pedal within 3 seconds after the light coming ON.
10. Start engine and let it run at idle for about 20 seconds.
12. Test the engine to ensure the idle speed and ignition timing are set correctly.

Regards.

on Mar 25, 2010 | Nissan Titan Cars & Trucks

1 Answer

Grinding noise at high rpm


Have you had fuel pressure tested, as well as exhaust for possible plugged catalytic converter?

May 20, 2014 | 2004 Kia Sedona

1 Answer

After cleaning the throttle body it looks to be stuck and RPM remain above 2000 when idling. Engine accelerates and decelerates going back to idling at about or above 2000 RPM.


When you cleaned the throttle body, did you remove the Idle Air Control valve/motor (IAC)? A dirty or defective IAC can be the result of your problems. The IOAC regulates your vehicles idling under various condictions. Try cleaning it first then replace if needed.

Please remeber to rate this solution. Thanks!

Feb 05, 2011 | 2002 Toyota Tacoma

1 Answer

I have a mitsubishi galant 1998 model.the problem is the rpm is to high even in the neutral the rpm goes up to 2000 rpm.


Do you have a "Check Engine" light? If not, check that the accelerator cable is functioning properly. When the accelerator is in the normal position the throttle plate should be completely closed. If necessary you should remove the air duct to inspect the interior of the throttle body. The cable should be have no slack but should allow the throttle plate to close all the way.

If the throttle is working properly then I would suggest looking at the idle air control (IAC) valve which controls the idle speed when the car is in park, in neutral or in gear and the accelerator is not depressed. Try disconnecting the IAC and note how the idle is affected. This will cause a Check Engine light to turn on. To clear it, disconnect the negative battery cable for 5 minutes then start the car. Let me know what you find out.

Dec 02, 2010 | 1998 Mitsubishi Galant

2 Answers

Have 1999 cavilleir does it have a rpm protecter


Yes, the PCM for your vehicle's engine has a rev/speed limit seeting programmed into it. Most stock, non high performance/police package vehicles usually won't go above a top speed of 97MPH. if you were to rev your engine while it was in park or neutral, once the engine reaches the cut out rpm limit preset in the PCM, it will cause the engine to cut back, then it will rev up until it hits the preset limit, then cut back, and it keep repeating that pattern. It may sound as though you have a high rev ignition failure that sounds like waaa, waaa, waaa, waaa, but that indicates the PCM is doing its job.

Apr 05, 2010 | 1999 Chevrolet Cavalier

1 Answer

Idling to high and engine revs from 1000 to 2000 rpm


lower the idle switch,might have to have mechanic do it if u dont know where it is,wont cost alot,very easy

Oct 18, 2009 | 2003 Honda CR-V

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