I have a 2012 35i, 3.0 with the turbo, if my memory is correct. It's got a little miss on mild acceleration and it's got the tell tale sign of cranking for a couple seconds before starting. The previous owner handed over all the maintenance records and one of the reports during some service was that the fuel pump might be failing and should be replaced.
I'm to the point now where I'm looking into that but I'm a little confused. Seems like there's one pump under the rear seat, low pressure, I assume, and then there's the high pressure one that's mounted on the lower part of the engine, driver's side, front area.
I know that high pressure one has it's known issues. When I look at the manual on ISTA, I don't see a way to check that high pressure one and even checking the pressure seems to take a rig of tubing and connectors, along with a pressure gauge.
Is there a way to check both of them, or should I only be looking at one or the other? Of course it would be great if the one I need to replace is the one under the back seat. That one's a lot easier and a lot cheaper to replace
Any advice to which one of those normally causes the slow to start symptom?
06-07-2021, 01:13 PM
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