My 93 F150, 4.9L (157,000) standard shift, idles and accelerates roughly. Other than that it runs great. The idle is fine for a few minutes after starting.

I've replaced spark plugs, wires, rotor, distributor cap and PVC. I tried fuel injection cleaner.

I bypassed the EGR valve and replaced the oxyen sensor (reinstalled the old sensor because it made no improvement).

Does anyone know what I should try next?

 

Check your TPS.
Take care,
-Chris

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'95 Eddie Bauer F-150 SC & '64 Falcon/Ranchero
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Besides what Chris allready states, I would check your Throttle Body Butterfly valve, They definnately will need cleaned. Take a brush and throttle cleaner and have someone hold the accelerator down(engine Off) and clean all of the black stuff off with a brush around the valve.

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Thanks!

1993 F-150 302/e4od/355 Limited slip. dual exhuast w/o mufflers,2 1/4" pipes with Echo Tips, headers, accel plugs/wires(8.6mm)/rotor/cap, hypertech powermodule, NEED INFO ON BLASTER COILS Alpine cd player and Pioneer speakers.(Front, need info on rears)

1989 F-150 XLT 4x4 302/aod true duals with turbo mufflers, 30X9.50" wild country tires, 3:55 gears w/LS(want after market LS for front)