Cadillac Repair: 92 Deville/ fuel pump, electric fuel pump, valve plugs

Question
When fuel pump is bad, what are symptoms? Motor runs good at start up, but starts to sputter and hesitate after warm up,stalls around corners. I am not presuming that pump is bad, just assuming it is.I noticed person with similar problem, and you replied that it is (possibly), fuel pump or filter related. Replaced EGR valve, plugs&wires recently. Could resistance problem with fuel pump be possible, can it have this sort of behavior,or is pump either good, or it is bad,works or does'nt work, that sort of thing. Sorry for poor description,and Thanks,   Ray.

Answer
Hello,

You should change the fuel filter for maintainance if the car hs over 60,000 miles. The quality of gasoline is not what it once was and you are not wasting your money by doing this.

Drivability problems are difficult to diagnose without the proper testing equipment. You could have bad injectors, computer problems, engine electroic problems etc.
Guessing and parts changing can get very expensive.

One of the common indicators of a bad electric fuel pump is for the engine to crank for a long time cold before it starts, in which it loses pressure after sitting.

Change the fuel filter and see what happens.

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