E92 325i Jerking/bumpy acceleration after filling up gas

Onu · 03-17-2020, 07:17 AM

Hey, interesting problem occurred after a night following a gas station visit. Acceleration got bumpy especially on lower RPMs. It's like accelerating - not accelerating - accelerating - not accelerating..etc until it reaches around 4k rpm->. Above 4k rpms and on steady speeds there are almost no issues.

First i thought about fuel supply. Visited repair shop, however they noticed that there is no outer fuel filter in this model, which is -06 e92, N52B25, so no help from this one either.

No error codes found nor any warning lights. Any idea where to start looking on this?

porsche959 · 03-17-2020, 07:21 AM

Probably a misfire, coils

Maybe throw some Techron fuel cleaner in the gas tank first

Soden82 · 03-17-2020, 10:23 AM

If you can log I'd check timing on each cylinder and fuel trims to make sure it's the gas causing it

03-17-2020, 07:17 AM	#1
Onu Registered 0 Rep 3 Posts Drives: E92, 325i, -07 Join Date: May 2018 Location: FIN iTrader: (0)	E92 325i Jerking/bumpy acceleration after filling up gas Hey, interesting problem occurred after a night following a gas station visit. Acceleration got bumpy especially on lower RPMs. It's like accelerating - not accelerating - accelerating - not accelerating..etc until it reaches around 4k rpm->. Above 4k rpms and on steady speeds there are almost no issues. First i thought about fuel supply. Visited repair shop, however they noticed that there is no outer fuel filter in this model, which is -06 e92, N52B25, so no help from this one either. No error codes found nor any warning lights. Any idea where to start looking on this?
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03-17-2020, 07:21 AM	#2
porsche959 Banned 471 Rep 996 Posts Drives: porsche Join Date: Jul 2018 Location: chicago iTrader: (0)	Probably a misfire, coils Maybe throw some Techron fuel cleaner in the gas tank first
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03-17-2020, 10:23 AM	#3
Soden82 Major 479 Rep 1,196 Posts Drives: 2011 BMW M3 Join Date: Jun 2017 Location: Boston iTrader: (1) Garage List 2011 BMW M3 [0.00]	If you can log I'd check timing on each cylinder and fuel trims to make sure it's the gas causing it __________________ 2009 BMW 335i 6MT big single (eventually) For now... MHD tuned VRSF Race IC DCI ATM exhaust
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