Car auto reving?

Small Yellow · 01-10-2010, 07:14 PM

Yesterday when I was driving my M3 around. I stopped at a light and noticed that my car was reving automatically. It was in neutral and I was not stepping on the gas nor clutch. I drove it to the nearest place I could stop (gas station) and turned the engine off. Turned in on about 1 min later and it was back to normal. Anyone experienced this?

artifice · 01-10-2010, 07:16 PM

did you just start your car? how high did the revs go?

JIO · 01-10-2010, 10:53 PM

Was your A/C on? The compressor will kick on the fans and it'll change rpms.

Small Yellow · 01-11-2010, 02:02 AM

Quote:

Originally Posted by artifice

did you just start your car? how high did the revs go?

I drove it around about 4 miles and noticed it when I stopped. I did turn on the AC at one point but dont remember when. I doubt its the AC though because it was reving from idle to like 2.5k

mkoesel · 01-11-2010, 01:23 PM

If it were 1k or so I'd shrug it off, but 2.5k is pretty high. There might be an issue, though I have no idea what kind of issue would cause such a symptom.

Small Yellow · 01-11-2010, 01:28 PM

Well it hasnt occurred anymore so I hope it doesnt come back haha.

Finnegan · 01-11-2010, 01:58 PM

ECU gremlins?

It might be an early symptom of the idle-valve issue; although I haven't heard of it manifesting in this way. If that's it there is a fix.

01-10-2010, 07:14 PM	#1
Small Yellow Track Addict 110 Rep 813 Posts Drives: 2010 BMW M3 E92 \| 2008 Z4M E86 Join Date: Oct 2009 Location: Orange County, California iTrader: (0)	Car auto reving? Yesterday when I was driving my M3 around. I stopped at a light and noticed that my car was reving automatically. It was in neutral and I was not stepping on the gas nor clutch. I drove it to the nearest place I could stop (gas station) and turned the engine off. Turned in on about 1 min later and it was back to normal. Anyone experienced this? __________________ BMW ///M3 Coupe Completed November 16, 2009 Received December 29,2009
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01-10-2010, 07:16 PM	#2
artifice Major 49 Rep 1,190 Posts Drives: 2008 E92 M3 Join Date: Jul 2009 Location: The Colony, TX iTrader: (0)	did you just start your car? how high did the revs go?
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01-10-2010, 10:53 PM	#3
JIO Captain 48 Rep 636 Posts Drives: '09 Space Gray E92 M3 w/DCT Join Date: Aug 2005 Location: Eugene, Oregon iTrader: (0)	Was your A/C on? The compressor will kick on the fans and it'll change rpms.
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01-11-2010, 01:23 PM	#5
mkoesel Moderator 7515 Rep 19,368 Posts Drives: No BMW for now Join Date: Jun 2006 Location: Canton, MI iTrader: (1)	If it were 1k or so I'd shrug it off, but 2.5k is pretty high. There might be an issue, though I have no idea what kind of issue would cause such a symptom.
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01-11-2010, 01:28 PM	#6
Small Yellow Track Addict 110 Rep 813 Posts Drives: 2010 BMW M3 E92 \| 2008 Z4M E86 Join Date: Oct 2009 Location: Orange County, California iTrader: (0)	Well it hasnt occurred anymore so I hope it doesnt come back haha. __________________ BMW ///M3 Coupe Completed November 16, 2009 Received December 29,2009
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01-11-2010, 01:58 PM	#7
Finnegan Dog Listener 703 Rep 7,850 Posts Drives: Z4M/. Z3M, E36/46 M3 Join Date: Oct 2008 Location: Teaching the dog to slalom iTrader: (22)	ECU gremlins? It might be an early symptom of the idle-valve issue; although I haven't heard of it manifesting in this way. If that's it there is a fix.
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