My 90 F150 has a miss in it. I have change the plugs, wires, cap, rotor, coil, ignition module, egr valve, full exhaust, fuel pump, fuel filter, oxygen sensor, checked the injectors, blew out the fuel lines, cleaned the intake. It still misses. What could it be??

 

Does it miss under certain conditions? Only in gear? Can you put a little more meat on the bone?

 

it misses more under idle but also misses while in gear it is a manule but it doesn't do it often in 5th

 

Might be sucking air through the intake gasket. Try taking carb cleaner and spraying it aroung the intake gaskets while it's idling. If you hear the engine rev, then you know you are sucking air.

Also, is it a consistant miss? Does it seem to happen more at low speeds and rpm's? For example, on the highway it seems fine, but when driving through town at lower rpm's it bucks/misses more.