Idle issue, 99 eclipse - Engine Troubleshooting


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Idle issue, 99 eclipse

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nirvanaku
New User

Mar 26, 2010, 4:25 AM

Post #1 of 4 (5074 views)

Idle issue, 99 eclipse	Sign In

I have a 99 Mitsubishi Eclipse GS Non-Turbo and am having some idle issues. my warm idle is sporadic jumping between 1900-1600 rpms. On a cold morning start it is still around 1300. Now coming to a stop and going into neutral the rpms are around 2300. If it does start to drop down below 1500 the engine will sputter like it is about to die. I have a friend who thinks it is the "idle control valve" but I was looking for another opinion. I have not tried anything yet, there is only 66,859 miles on this car. I hope that is enough information for somebody to help me, if not ask me for more.

Thankful for any input,
Chris

(This post was edited by nirvanaku on Mar 26, 2010, 4:29 AM)

re-tired
Veteran / Moderator
re-tired profile image

Mar 26, 2010, 6:48 PM

Post #2 of 4 (4643 views)

Re: Idle issue, 99 eclipse	Sign In

Mitsubishi has what is known as a stepper motor for the idle control . and they have lots
of problems with them.

LIFE'S SHORT GO FISH

Sidom
Veteran / Moderator
Sidom profile image

Mar 26, 2010, 9:04 PM

Post #3 of 4 (4641 views)

Re: Idle issue, 99 eclipse	Sign In

Well as RT mentioned there are some problems with the IAC.

The one thing I did notice in your post is that you said if it goes below 1500 is sputters & wants to die.

You may want to check for a vacuum leak. Check around the intake manifold, those were also good about splitting gaskests and it's usually in a spot thats hard to get to. Get a can of carb clean and spray around in different spots and see if it has an effect on the idle.....If it does then you have a vacuum leak.

nirvanaku
New User

Mar 27, 2010, 12:02 AM

Post #4 of 4 (4639 views)

Re: Idle issue, 99 eclipse	Sign In

Thank you for the suggestions, I will give that a try as soon as I can and let you guys know how it goes.

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