if my car has trouble starting once and a while and i have changed the spark plugs, air filter, fuel filter, fuel filter hoses, and used fuel injector cleaner, can the problem be my fuel pump or wat else can it be?
Sorry i can't give you a definate yes, as my experience with fuel pumps has always been that when the fail, they fail. I never had a warning of intermittent outages.
You might try replacing the fuel pump relay and the DME relay, also clean off the prongs on the #18 fuse.
"If an electical system fault interrupts power to the fuel pmp, the engine will not run."
Source: Page 160-6 from the Bentley BMW 3 Series Service Manual.
When the fuel pump in my 91 318is failed it was interment and would on occasion start, run fine and when I would attempt to restart it would fail. This occurred for about a week than it just plain quit!
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