92 5.0 stumbling
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New User
Joined: Feb 2007
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92 5.0 stumbling
I have a 92 F-150 supercab, the chasis is High mileage, but the engine is not, or I was told it wasn't the chasis has 290,000 on it. Lately the engine has started stumbling, when driving on level ground it is fine but under light aceleration, or climbing a grade prior to downshifting it will stumble, like it's trying to skip. I have replaced the plugs, wires, cap, rotor, cleaned the intake, run seafoam through it, recently replaced the front tanks fuel pump, and changed the filter, nothing has made it better, anyone out there have any suggestions on things to check or try, no loose vacuum connections that i've found or any other things to lead me to the obvious from what I know, used to turn wrenches on 5 liter mustangs pretty regular, but never anything like this popped up. thanks for any suggestions.
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Joined: Apr 2003
Posts: 448
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From: Edmonton, AB Canada
look into the timing and knock sensor, if it is timed too far advanced then it will ping and the knock sensor will back off the timing considerably. Other than that you have done all the other stuff that I would reccomend, except for pulling codes and seeing how far that gets you. Good luck
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Thanks I'll check that too, I forgot some more info that might help too, I replaced the tps sensor some time back, never got it adjusted. it lately has started giving me trouble sometimes when i crank it. It will spin and act like it's starting only to die immedialty, or i let the key roll back to quickly, when i try to start it again, the truck appears to be flooded. not sure what that will have to do, it does occasionally start pinging badly when i'm driving it, and then just a suddenly it just stops.
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Ok, I'll try that, this has been one of those problems you just throw it all at, in my experiance with all the fords i've owned, it's always something simple and when you find it you always think, now why didn't i think of that to start with.
