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      02-13-2023, 02:09 AM   #1
Khambinho
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2014 335i Rough Idle On Startip

Went to start my car and the rpms jumped up to about 1800 before dropping to about 500 where the car almost stalls out but normalizes itself after that. No codes thrown. Anyone know what might be going on?.video

2014 335i xdrive
Stage 1 bm3
Ctless dp
Cts intake
Cts charge pipe
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      02-14-2023, 02:57 PM   #2
thejeremyman9
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Did you actually scan for codes or did you just not get a CEL/DTM?

If its a one-off i wouldnt worry about it. If it keeps happening you can investigate further. If it happens every time, try starting with the MAF unplugged and see if it still does it
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      02-14-2023, 06:56 PM   #3
RVA_N55_Fan
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Quote:
Originally Posted by Khambinho View Post
Went to start my car and the rpms jumped up to about 1800 before dropping to about 500 where the car almost stalls out but normalizes itself after that. No codes thrown. Anyone know what might be going on?.video

2014 335i xdrive
Stage 1 bm3
Ctless dp
Cts intake
Cts charge pipe
Agree w advice given. Could be many things. Mine ended up being exhaust manifold gaskets and a bad coil.
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      02-15-2023, 04:49 AM   #4
Khambinho
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Quote:
Originally Posted by thejeremyman9 View Post
Did you actually scan for codes or did you just not get a CEL/DTM?

If its a one-off i wouldnt worry about it. If it keeps happening you can investigate further. If it happens every time, try starting with the MAF unplugged and see if it still does it

Didnt get a CEL/DTM , but still scanned for codes. Came back with nothing. Happened a few days ago and havent started the car since. I heard unplugging MAF sensor is a temp fix but will try it.
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      02-15-2023, 11:59 AM   #5
thejeremyman9
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Quote:
Originally Posted by Khambinho View Post
Didnt get a CEL/DTM , but still scanned for codes. Came back with nothing. Happened a few days ago and havent started the car since. I heard unplugging MAF sensor is a temp fix but will try it.
You dont unplug it as a fix, you unplug it as a test. It's not a solution its just to try and narrow down the problem.
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