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04-30-2024, 11:01 AM | #1 |
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Cranks but won't fire - Video inside - Suggestions/Help Needed
Have a 2015 m3 - was doing a hard 2-3 gear pull, didn't make any weird noises just felt like it ran out of power, died and shutoff, went into neutral and I coasted to a stop.
Now, the car will only crank, and sputter a little bit but won't fire as you can see in the vid. There were only a few codes on ISTA from when it happened, see screenshot. Googling these didn't come up with much. I tried clearing all the codes, then cranking the car more, but no other codes came up. Also tried using ISTA to check terminal 15 and 30, and they seemed to show voltage OK. ISTA confirmed that there is fuel pressure from the low pressure pump at the sensor. Do the high pressure pumps suddenly fail? It does seem consistent with the engine timing being off so I am wondering about a spun hub ( I did have a CBC) Car has a stage 1 BM3 tune. Any suggestions on what to try next? Is there a way to check for spark on these cars? Any other way to check if it's a spun hub if there are no codes? Thanks in advance! Last edited by LRGM3; 04-30-2024 at 11:08 AM.. |
04-30-2024, 09:55 PM | #3 |
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Thanks for the reply.
What are the common ways to investigate the fuel system? On ISTA when I did the pressure sensor test it showed 7-8 BAR of pressure which seemed ok. Any suggestions on that? |
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05-04-2024, 03:24 PM | #4 |
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I'm by no means an expert on this stuff, but you've got a weird list of codes, including stuff related to cameras and the windscreen. Which kind of makes me think some kind of module blew, that also has something to do with your starting issue. Or a fuse maybe? It seems more electronic as opposed to a primary engine mechanical issue
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