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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > starting rpm



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      12-03-2014, 11:55 AM   #1
powerhouse_b
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starting rpm

I noticed my car sometimes does cold starts at close to 2000 rpm, then almost immediately drops to around 1100 (then to 900 after 30'ish seconds). That seems a bit to high, and with the PE, the difference between a 1500 rpm start-up (what I usually see) and 2000 is huge! I know outside/coolant temperature is a factor, I just can't figure out a pattern (with a cold engine, I've seen starts at 1500 with sub-freezing temperatures and at 2000 with 60+ outside).

Other then that, I don't see anything wrong, no idle fluctuations (warm or cold) or anything.

Any idea of why the starting rpm varies so much? What starting rpm are you guys seeing?
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      12-03-2014, 11:59 AM   #2
JDane07
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On a normal cold start it initially revs up to around 1500, immediately levels off around 900-1000, then eventually goes down to 600-700 when warm.
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      12-03-2014, 06:27 PM   #3
rick100
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1200 then after a minute it drops down to 600

I wouldnt worry too much about it...
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      12-10-2014, 09:01 AM   #4
powerhouse_b
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Not worried, only annoyed at how loud it gets. From what I hear from you guys, normal starting rpm is in the 1500 range.
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      12-10-2014, 09:03 AM   #5
Mike.
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2013 BMW 335xi  [10.00]
It's like ~1200, and pretty loud when you have the secondaries out on a cold start
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