How do i know if i need to change fuel pump or fuel filter

Asked by Apr 17, 2017 at 06:13 AM about the 2004 Pontiac Grand Am

Question type: Maintenance & Repair

When i first got car gas mileage great
then change oz sensor after that now
my car drinks gas bad how do i know if
its fuel filter or fuel pump

1 Answer

90,825

It would not be either of these, but it is a good idea to change out the fuel filter anyway. It is one of the most overlooked maintenance items that need replacing on a regular basis. Sounds to me the engine needs a going over, possible tune up. But there is more to a tune up these days than just changing parts to try and make it run better. The intake manifold bolts should be snugged up, and checked for vacuum leaks, the throttle body should be cleaned, Mass Air Flow Sensor should be cleaned, any trouble codes taken care of. One of the biggest things for gas mileage is the air filter, and the cleaning of the MAF.

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