Frank Enstein
Best. Day. EVER!
An upstream O2 sensor past it's expiration date can cause excessive fuel to be injected. A bad ground on the O2 (low voltage) makes the computer see a lean condition that may not be real
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Reve the engine and see what the fuel pressure does. It should come up as the engine RPS do. As for brand pump, AC Delco or Delphi ONLY. I put a cheap pump in years ago, and it lasted 3 months. I just replaced my FP last weekend. Took the wife and I 3 hours. Thats dropping the tank, and cleaning it out. I also changed the screen on the pump ( a must do with a new pump) and replaced the fuel filter. When I say 3 hours, thats from the time I jacked up the truck, to the time I put the rear tire back on, and lowered the truck, and fired it up. Total cost was just under $125. I did just the pump, not the assembly.
Ive never had an issue with mine, but another thing that will give those issues, is a bad fuel pressure regulator. Thats where reading what the fuel pressure gauge is telling you comes in. There is a video on you tube, where the guy punches the gas, engine running, and the truck just stumbles. Its starving for fuel. Its the fuel pressure regulator, not adjusting to the engines demands. He has good fuel pressure, its just not adjusting for the demand. All of the times I have replaced my fuel pump, my truck has always run a lot better once I replaced the pump. This last pump, lasted about 6 or maybe 7 years. Thats about average it seams in my experience.
If it comes to a new spider, take a look at the upgraded or up dated one. It moves the injectors to where the poppet valves are. If you dont already know about that. Just FYI.Good advice,If the new pump don't fix it I'll stuff a new spider down her throat with the new regulator.
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Amazon prime 2 days ago. rock auto had it for $5 less but they have shipping fees. Right now on amazon prime they are 268.03 and free shipping.Where did you get that?