DO I NEED A NEW FUEL PUMP? on 1997 Oldsmobile LSS

My car is loosing all power when driving after about 5-10 minutes. It acts like it isn't getting gas when I'm stepping on the accelerator. When I come to a stop it boggs out and dies. after it sits for a long while it'll start right back up again and we start over with the same thing. every time. I have changed out the fuel filter, the spark plugs and wires and all 3 ignition coils. What the hell is the problem. Oh and my fuel pump is making a whinning noise when the key is in the on position. Is the fuel pump the problem?

by in Phoenix, AZ on April 04, 2011
3 answers
ANSWER by on April 04, 2011
could be. you need to have the pressure checked at a shop to verify. if you do, have the cat converter checked for blockage. Roy
ANSWER by on April 04, 2011
I would verify fuel pressure and volume prior to condemning the fuel pump as being bad. They way I find a problem like this is to "tee- in" a fuel pressure gauge and tape it to the windscreen of the car, drive the car and see if the fuel pressure drops as the problem occurs. If it is a fuel pump delivery problem the fuel trim values should indicate this using a professional grade tool you would see Long Term Fuel Trim figures would be adding fuel. Before jumping to any conclusions the problem needs to be properly diagnosed.
ANSWER by on April 07, 2011
A plugged catalytic convert sounds most likely. The noise from the pump is typical. I would recommend a back pressure test on the catalyst. And a pressure checked the fuel system
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