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BMW 3-Series (E90 E92) Forum
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Cold start long crank - ECU tune issue?
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12-24-2012, 08:17 PM | #1 |
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Cold start long crank - ECU tune issue?
I have custom ecu tune on my 3000 miles old 2011 335is. After I got the tune, I sometimes received engine malfunction reduced power message during cold start when outside temperature is cold. Engine malfunction code disappeared automatically after a second or so but it left 2f0c shadow code.
After I got flashed with revised file, I no longer get engine malfunction light, but engine sometimes takes longer to start during cold start. It never happens when engine is warm. Here is the video showing cold start hesitation. I am going to contact tuner after holiday, but I am wondering if tune file can actually cause this engine start hesitation issue. It happened on the next morning right after I got car flashed with revised file. Hesitation never happened with stock tune and first tune file with engine malfunction problem. Or am I actually experiencing physical hardware issue (hpfp)? Other than cold start hesitation, everything else seems to work fine. |
12-25-2012, 01:40 PM | #5 |
2020 Z4 M40i - 2022 M4C Convt
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No long cranks 32 degrees + tune
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12-25-2012, 05:06 PM | #7 |
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When you first unlock your car, listen carefully for the priming of the pump. If you don't hear it then lock and unlock again. See if that solves your problem.
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