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BMW 3-Series (E90 E92) Forum
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Power surging when engine cold
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08-15-2019, 09:57 AM | #1 |
Captain
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Rep 634
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Power surging when engine cold
Whenever I first start my car in the morning and take off I get power surging for the first few minutes until it warms up. Does anybody have any idea what that would be?
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08-15-2019, 04:46 PM | #5 |
3461
Rep 79,211
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Drives: C6 Z06, 09 335i, 10 335xi
Join Date: Dec 2008
Location: www.TopGearSolutions.com
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When you start up, do you wait for the kick down in RPM before going?
If you go within the first 45 seconds of startup without waiting for the kick down in RPM (High Idle Start), it will surge. There is also another cold surge related to auto transmission warming up, I believe it's the torque converter lock-up, not 100%. If neither of these apply, consider making a video. |
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08-16-2019, 08:37 PM | #7 |
Captain
251
Rep 634
Posts |
I have recently rebuilt the engine done transmission service. So those should be fine. This is about 2~3 minutes after I start off. Mainly my first full acceleration on the main road from my neighborhood. It does go away after warming up for 5 minutes or so.
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