Question about 2002 Mercury Mountaineer

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Mountaineer will start and run but will not idle

I start my Mountaineer, but it dies within a second or two until I accelerate and move it. It will run then until I stop and it shuts off and will not idle.

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  • 148 Answers

Check for a vaccum leak on the PVC hose on the intake if there is no problem there the idle air control valve maybe no good also make sure the EGR valve is not open the check engine light sould be on if that was the problem

Posted on Jul 19, 2009

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Posted on Jan 02, 2017

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Tip

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

Why does my 2005 mountaineer die when I stop or slow?


The stall problem could be a faulty idle air control valve or dirty throttle body. The computer uses the valve to adjust base idle speed depending on the load on the engine.

Jul 31, 2012 | 2005 Mercury Mountaineer

1 Answer

The mountaineer won't start. When i turn on the headlights the lights on the dash board goes dim and the gauges be moving fast.


Sounds like you have a low voltage problem.Take a volt meter and battery voltage first it should be 12-12.7 volts not running and key off.Then start engine and check the voltage coming out of the alternator it should be 13-14.7 volts.If one of these are not within these specs then replace which everone that is bad.

Aug 10, 2011 | 2005 Mercury Mountaineer

1 Answer

Have mecruy montneer 2001 lost keys how to program it


Programming Instructions: 2001 Mercury Mountaineer.


1. Turn ignition from OFF to RUN 8 times within 10 seconds, with the 8th time ending in RUN.
Door locks will cycle to confirm programming mode.

2. Within 20 seconds press any button on first keyless remote. Door locks will cycle to
confirm programming.

3. Within 20 seconds, press any button on second keyless remote. Door locks will cycle
again to confirm programming.

4. Turn ignition to OFF. Locks will again cycle to indicate end of programming mode.

Apr 26, 2011 | 2001 Mercury Mountaineer

1 Answer

2001 Mercury Mountaineer won't idle. It will run when I've got my foot on the accelerator, but as soon as I take it off, it dies. What's wrong with it?


Sounds like a faulty, IAC valve (idle air control) which controls your idle under load etc. Normally mounted on side of throttle body.Fairly simple for technician to test with ohmmeter to confirm before replacing. If your familiar with ohmmeter, get back to me and I'll guide you through test, otherwise shouldn't cost much for mechanic to test.

Dec 02, 2009 | 2001 Mercury Mountaineer

1 Answer

SOHC 4.0 - cranks with no problem. Will


most common problem is an IAC (idle air control) motor and computer reprogramming

Nov 19, 2009 | 1998 Mercury Mountaineer

1 Answer

The 2000 mountianeer starts and runs fine but shuts off


CHECK THE COLD START ENRICHMENT VALVE AND OR THE IDLE CONTROL VALVE. I AM ASSUMING THAT YOUR VEHICLE IS FUEL INJECTED. ONE OF THOSE HAVE GONE BAD.

Jan 24, 2009 | 2000 Mercury Mountaineer

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