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Ok, so i've finaly got fed up with my crazy idle. My car idles at about 2000 when its cold. Then after a bit, it will idle anywhere from 500 to 1100. Also, when i turn my lights on, idle drops about 200. What could be causing this? and what can i do to fix it. Thanks.
 

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high idle is a common problem.
You could try cleaning out the EACV. It's on the back of the intake with 2 bolts. Pop it off....easy job. Don't spill too much coolant tho.

There's also a control screw on the throttle body. Flat head, copper colored. Try adjusting it a bit.

The RPM's dropping sounds like your alternator needs refurbishing.
It's a messy job, but not hard and relatively cheap too.
 

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One thing to add, when you adjust the screw on your TB(at least this is the process on OBD1) unplug your EACV/IACV and start the car, adjust idle to where you want it to be, shut car off, reconnect IACV and ECU. I doubt there isnt much change on an OBD0 setup, but I cant say for sure...
 
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