my 1990 325i has been having a high idle for about a week now. prior to that, it had been having idle issue with dipping down too low. i then tested the idle control valve, tested it, looked at it, cleaned it out, and put it back in. it pretty much ran the same after that, so i assumed a bad idle control valve. i unplugged the ICV, and found that it made the idle more stable. after about two weeks (after i cleaned the ICV and put it back in), it started to have a high idle. the idle started out at about 2000 rpms, and is now sitting at about 2500 rpms. it also seems to make the temperature rise. i thought i had figured it out, but i am now more confused. help? :D
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1990 Brilliantrot 325i (Always a project)
2015 Alpine 320xi (Daily) -
Intake leaks, a bad ICV, or a binding throttle or accelerator cable are the likely causes.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL -
I am 100% sure the ICV is bad. And last night I was actually thinking about the throttle cable, so ill check that out. Thanks for the ideas!sigpic
1990 Brilliantrot 325i (Always a project)
2015 Alpine 320xi (Daily)Comment
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Bad TPS will also cause this... TPS tells the ICV what to do.Originally posted by KLiz90 View PostComment
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Tps change it you'll be happy youStrategic nw e30 commandOriginally posted by bmwm42Comment
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alright, ill also check that out. seems like the ICV is bad though. havent had time to check it out again yet. hopefully this weekend i can get it all sorted out!sigpic
1990 Brilliantrot 325i (Always a project)
2015 Alpine 320xi (Daily)Comment
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It could very well be the ICV but if the TPS goes out it sends the wrong signals to the ICV and makes you think its the ICV. A good test to do for the TPS is the "stomp test". A bad TPS will usually prevent the stomp test from working and giving codes.Originally posted by KLiz90 View PostComment
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