Fuel Pressure Problem? - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 05-06-2010, 08:57 PM
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Fuel Pressure Problem?

On my 95 M3, the gauge on my adjustable FPR reads 56psi at idle, and jumps to 64psi with a little rev. After turning the car off it drops to 42 psi within a minute, and after 5 minutes or so it's back to 0.

Is this normal? Bentley says my operating pressure should be in the 40s. Also, the gauge shows nothing when my ignition is on, but car is off. Should the fuel pump be pressurizing at this point?
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#2 (permalink) Old 05-07-2010, 10:38 AM
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Hmm just clicked key to position 2 and fuel pump turned on and pressure gauge shows 42 psi... then slowly but steadily decreases while key still in position 2.
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