Cylinder 4 misfires! Can't find the problem

joselaholla · 11-12-2023, 06:28 PM

Hello, Did you resolve this issue? I'm having the same issue with my X1.

Costello · 03-24-2024, 01:15 PM

Quote:

Originally Posted by AlpineweissF10

I did a static compression test by disconnecting the fuel pump and removing spark plugs and connecting compression tester and cranking for about 10 times for each cylinder. They all came in around ~210 (+/- 2).

I then did a leak down test and it showed less than 4% leakage for each cylinder.

Sounds like you did a running compression and that was the issue. I'll look into that next. Hope that's not the case.

Quote:

Originally Posted by Felixrobb

Nope, Still not resolved...

And you solved this?

AlpineweissF10 · 03-26-2024, 08:42 PM

Not sure what happened but mine was the HPFP. Sounds weird but replaced it and it's been running great.

11-12-2023, 06:28 PM	#23
joselaholla Registered 0 Rep 1 Posts Drives: bmw X1 Join Date: Nov 2023 Location: Florida iTrader: (0)	Do you resolve this issue? Hello, Did you resolve this issue? I'm having the same issue with my X1.
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03-26-2024, 08:42 PM	#25
AlpineweissF10 Private 10 Rep 63 Posts Drives: 2012 535i Xdrive Join Date: Aug 2019 Location: Ontario iTrader: (0)	Not sure what happened but mine was the HPFP. Sounds weird but replaced it and it's been running great.
	Appreciate 0 Quote