Quote:
Originally Posted by reefgeorge
151K miles. Feels like small interuptions in power intermittently at speed like spark or fuel problems. No codes. Did plugs, wires, distr, rotor, fuel filter thinking that was the reason. No change. The fuel pump died. Replaced that, no change. Fuel pressures look good at the curb. Fuel mileage is nominal. The truck idles rougher. I do a lot of highway driving and breakdowns are a real pain so I am trying to catch this while the truck is still running but of course I have no identified failure (yet). I plan on another fuel filter change (because of the new fuel pump), check vacuum, check again for soft codes.
What are the most likely causes for this vehicle/year/mileage?
Thanks,
George
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151K coulkd be many things.
Did yoy use a delphi fuel pump for replacement?
Have you checked for good fuel pressure?
Hoe is secendary ign?
How many miles on plugs and wires and cap?
Fuel and air filter?
Good Ac delco plugs?