Guys, the beast did something weird today. Oscillating Engine/RPM - BMW M5 Forum and M6 Forums

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Guys, the beast did something weird today. Oscillating Engine/RPM Guys, the beast did something weird today. Oscillating Engine/RPM
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Old 1st August 2012, 01:26   #1
335xi
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Guys, the beast did something weird today. Oscillating Engine/RPM
I was in S6/P500 driving on this country road at around 35-40mph at around 3500rpm. I was keeping the rpm steady but as the car approached a light uphill, I heard the engine rpm go up and down as if I were applying more throttle and then letting off the throttle. I looked at the dash and I did not see anything suspicious, no lights, no rpm oscillation. This happened very quickly and it went away just as quickly. After what it seemed like a few seconds, it stopped doing it. WTH?
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Old 2nd August 2012, 04:21   #2
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my car does that alllll the time while idling. i think its natural?
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Old 2nd August 2012, 04:37   #3
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What's the level of fuel? How long ago did you fill up your tank?
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Old 2nd August 2012, 17:00   #4
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Wasn't idling, I was cruising at 35mph
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my car does that alllll the time while idling. i think its natural?
I know the oscillation at cold idle.
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Old 2nd August 2012, 17:01   #5
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Only did it that one time
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What's the level of fuel? How long ago did you fill up your tank?
Fuel was on the low side, had 30 miles left in the tank.
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Old 2nd August 2012, 17:51   #6
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Mine does that occasionally too; almost like it's going to stall. I think I read somewhere about cleaning the ISV (idle stabilizer valve)?
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Old 2nd August 2012, 20:31   #7
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Sounds like slipping clutch..
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Old 2nd August 2012, 22:57   #8
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That would be bad
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Sounds like slipping clutch..
As the clutch is brand new with about 2,000-3,000 miles on it.
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