Question about 1998 Plymouth Neon

1 Answer

Engine Turns Off when running AC

When I'm running my AC and coming to a stop, my RPMs are reduced to nothing and the engine comes to a stop. I have to turn the car back on and keep my foot on the accelerator to keep the engine from dying. Sometimes the RPMs will dip, but come back up, especially when I'm moving slowly. It rarely happens when I'm not running my AC, but it has happened. I have a 5 speed with a DOHC.

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.

    New Friend:

    An expert that has 1 follower.

  • Expert
  • 182 Answers

Your throttle speed sensor(idle speed sensor)is not working properly.It's job is to keep the the engine at the proper rpm range when you are not applying the gas peddle.This is the most likely cause.

Posted on Aug 26, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

01 Cadillac overheating and having no power like it has a governor on it

The engine is swelling because of the over heating. Stop using it !!!!!!!!! Gotta fix cooling system lest you seize the engine.

Nov 11, 2015 | Cadillac Cars & Trucks

1 Answer

My rpm's raise and drop at a stop and engine stalls when i turn ac off

We need to know the model, year, engine size, and the actual trouble code to really help you; but I provide some generic tips at the link below. Do not replace the sensor until the problem is properly diagnosed. O2 sensors rarely cause stalling. Get the computer scanned and ask them to find any historical or pending trouble codes. Write them down and post them here.
Do It Yourself Diagnosis and Repair

Aug 23, 2017 | Cars & Trucks

1 Answer

AC blowing only hot air. How can I tell if it is the comprosser and just needs recharged?

When the engine is running, turn the AC on and watch the tachometer if you see the RPMs dip slightly then the compressor is kicking on. You should also be able to hear a new sound coming from the engine (do this with the hood lifted).

If you hear it come on and see the RPMs dip slightly, then the compressor is probably still good and it just needs to be re-charged.

Jun 08, 2011 | 2003 Chevrolet Malibu

2 Answers

My '99 Saturn SL Check Engine light turns on constantly. It sounds like it wants to stall when I come to a stop. Also, if I turn on the ac, the rpms don't stay steady. Could it be my transmission?

something in the air fuel management. check the hose from the air cleaner to the throttle body.there is a sensor on that hose,that if the seal is no good,will cause idling and running problems.

Nov 05, 2009 | 1999 Saturn SL

1 Answer

2000 isuzu rodeo check engine light flashes when at or around 2500 rpm and up. engine runs smooth and no codes come up ? light goes out when rpm is reduced.

are you checking code with a small simple scanner this will not always work, a larger more sophisticated unit may find code or runs codes at over 2500 rpms when light comes on

Oct 30, 2009 | 2001 Isuzu Rodeo

1 Answer

1984 eldorado biarritz 4.1 engine Just bought it and it seems to run good, but when you come to a stop the engine will stumble, then idle will drop but not die. AC was running. Possible causes?. Put in...

check all vacuum hoses.if any looks cracked replace them.make sure carburater bolts are tight.check the egr valve make sure its not leaking.besure have your idle speed should be at 550 to 600 rpms.

Jul 10, 2009 | 1984 Cadillac Eldorado

2 Answers

AC blows cold while moving, and gets warmer while I'm stopped

There are two fans behind the radiator. One is suppose to begin running when the AC is turned on. The other is to cool the radiator when it gets too warm. Raise the hood with the engine running and AC "on"and see if at least one fan is running.

May 04, 2009 | 1995 Buick LeSabre

1 Answer

Engine runs rough after about ten minutes /idles really low

Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.

Jan 16, 2009 | 1991 Plymouth Laser

1 Answer

Cooling fans will only turn on if engine is off only

Electric cooling fans do not run all the time. They will only come on if the engine exceeds normal operating temp. Also will run when AC is on. Easiest way to make sure they are operating properly is to first verify they run when the AC is on. Next turn the AC off and run the engine at 2500 rpms sitting still and monitor the temp gauge (don't let it get into the red). The fans should come on after 10-20 minutes (depending on outside temp.). As the engine cools down they will turn off.

Jan 04, 2009 | 1995 Honda Accord

Not finding what you are looking for?
1998 Plymouth Neon Logo

Related Topics:

171 people viewed this question

Ask a Question

Usually answered in minutes!

Top Plymouth Experts


Level 3 Expert

79865 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8836 Answers

Are you a Plymouth Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides