Eratic engine speed |
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Howard
Moderator Group Did I say thaaaat? Joined: 14-October-2002 Location: United Kingdom Status: Offline Points: 735 |
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Posted: 24-March-2014 at 14:38 |
My 635 has started revving up from 1500 revs to 2500 and back down again, making it almost un-driveable except in 2nd and with a foot poised on the brake.
Changing the startup temperature sensor had some effect, but it was only short term. Now it revs between 2000 and 2500 RPM. Has anyone else had a similar problem, and if so how did they solve it. |
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Andrew Rolland
Moderator Group Go away rain Joined: 19-August-2004 Location: Scotland Status: Offline Points: 6579 |
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Idle control valve bunged up?
Clean it out with Wynns Carb and fuel injector cleaner, dissovles oily gunk in seconds.
Or
Coil.
I had an erratic idle problem on my Mini, turned out to be the ignition coil.
Or
Air leak from egr system or inlet manifold joints etc.
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Be exclusive and drive a Petrol 5 Series!
Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto |
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Indian
Groupie Joined: 29-March-2009 Status: Offline Points: 78 |
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I had similar problem with my E23.
Recon AFM and change all the vacuum and intake hoses solved the problem. Starts on the button even after sitting in the garage for 2 1/2 months
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