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      07-19-2023, 07:44 AM   #1
NJMorrisM5
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Fuel pump swap

Hello!

As above has anyone done this themselves?
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      07-19-2023, 05:23 PM   #2
m5rosco
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High pressure, yes. Upgraded to f90 pumps. Very easy.

Make sure battery is disconnected so low pressure pump doesn't kick in whilst the hardliner are removed!

I'd advise getting new bolts from BMW. They are very cheap and have threadlock already applied.

When removing the old bolts, and fitting the new, alternate side to side a quarter turn at a time to make sure the pump comes out and goes in square. You could snap the shaft inside pump if pulled down out of square.

Torque to 12nm.
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      08-02-2023, 11:47 AM   #3
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Not sure if it was the fix but after adding the f90 hpfp's I stopped getting the Drivetrain Malfunction at higher speed pulls.

Are you doing this to correct an issue or for tuning purposes.
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      08-03-2023, 01:02 PM   #4
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Nice to know it's not hard to change these out yourself.
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      12-28-2023, 11:42 AM   #5
KurtsM5
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I did the low pressure pump under the back seat. Sucked. It was blowing fuses.
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