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Idle problem..

 
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Old 03-16-2016, 08:33 PM
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Idle problem..

My 89' si 4ws seems to be running good but the idle is running high... And stays high... Common problem? How to fix?
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Old 03-19-2016, 02:48 AM
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Re: Idle problem..

What is your idle rpm when you start it up and what is it after you drive it?
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Old 03-20-2016, 12:18 PM
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Re: Idle problem..

When I start it runs at 2rpm. Then after it warms up it bobbles between 1200 and 1800. Up...down...up...down. No check engine light.

Last edited by 2ndgenrex; 03-20-2016 at 12:24 PM.
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Old 03-21-2016, 11:25 AM
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Re: Idle problem..

Wait, the idle bounces? In your first post you mentioned that it stays high. That would seem to indicate that it's constant but high. Now you're saying it bounces after it warms up. It's important to be consistent when describing symptoms if you want us to be able to help you.

Read through this thread for possible causes of a bouncy idle. After you fix the bouncy idle you can figure out the high idle problem. But I wouldn't try fixing that until you can get a smooth idle...
Bouncy Idle Fixes
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Old 03-21-2016, 02:14 PM
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Re: Idle problem..

Sorry, my fault for posting too soon after purchasing the vehicle. I thought it was just a high idle bc when I first started the car it was around 2rpm and I didn't let it warm up. But I've noticed after starting it more that if i wait a few minutes so it can warm up it bounces between 1200 and 2000. Thanks for the link I'll get aroudn to it this week.
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