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Registered
Join Date: Aug 2005
Location: New Hampshire
Posts: 13
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engine revs up/down when warmed up
Once warmed up '87 325E engine goes into continuous cycles of engine revs going up then down in fairly rapid succession. Repeats about every 1 to 2 seconds.
Any ideas about the problem ? Thanks Brendan
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bdaly |
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09-09-2005, 10:50 AM
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Registered
Join Date: Dec 2002
Location: Poquson, VA
Posts: 233
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Idle Issue
Sounds like the Idle Control Valve (ICV). I would remove it and clean it out (internally) with some throttle body spray cleaner.
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09-10-2005, 06:07 PM
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Registered
Join Date: Aug 2005
Location: New Hampshire
Posts: 13
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Bear,
I will give it a try this weekend. Thanks for advice. Brendan
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bdaly |
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09-13-2005, 05:31 PM
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Registered
Join Date: Aug 2005
Location: New Hampshire
Posts: 13
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Today, I finally got around to removing the ICV and cleaning it internally. I actually used carborettor cleaner. When I replaced it, it did not immediately fix the problem. however after I drove the car for about half an hour I noticed that the car was revving at a lower RPM. I think the carb cleaner I used was actually clogging the ICV somehow and it evaporated when the engine got warm, thus clearing the opening in the ICV. (My theory!) I should have bought some throttle spray!
The car now revs at 1000 RMP when stopped in park and 500 rpm when stopped in drive. Is this correct ? I tried to adjust the ICV but the screw cannot be adjusted any lower.
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bdaly |
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12-30-2005, 02:05 PM
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