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1994 f150 4x4 5.0L
when the truck is still cold and I take it for a drive it goes good untill you step on the gas a little more, it slows down, spudders and pops....
when you put the gas to the floor it kicks out of the spuddering and into passing gear ... then it usually works fine for normal driving after that
If it does it only when the engine is cold, check the temperature sensor for the computer. It might be bad, telling the computer the engine is already warm. The reason it runs better when flooring it is because the engine gets extra fuel at WOT.