Ford1504x4 1990 5.o my truck runs like it is lossing power. i put bosh plugs and excel wires with cap and rotor. egr check out ok. it sometimes POPS when i step on the gas and acts like it its running out of gas.. new fuel pumps installed in both tanks.and filters.. engine is remanu-and has only 35,000 miles. do you have any suggestions for me??

Did you replace the distributor cap and rotor as well ? Has the coil been checked for signs of arcing, carbon tracking ?

Just a thought,pull the dist.cap and make sure the rotor has
no side to side play ,thinking maybe a bad upper bushing in
the dist.Also,if the EGR valve has carbon and soot built up
on the piston it will make it idle really poor ,but run ok.
Might pull the EGR and clean it with intake cleaner.
Hope this helps.

Retarding the timing will cool the combustion which will lower the Hydrocarbon number,it will run bad but after a passed e test put the timing back to an advanced state which may help with the stumble.

sounds like either a vacuum leak (check the bottom of the "tomatoe juice can" for starters) or a bad or plugged egr valve or egr solenoid.
check engine lite refers to emissions probs only...most likely egr or vac leak. Had the same prob on my 95 5.0 f150...needed new can and egr valve.

Have you checked for vacuum leaks at all lines and going to the MAP sensor? It also has a TPS(throttle position sensor) and CPS(crankshaft position sensor),I think.
I'm thinking vacuum leak or TPS. don-ohio

EGR Valve--I would assume the shop checked it

Unplug vacuum lines to valve,plug them and road test yourself,up hill.

Check for vacum leaks make sure hoses arn't cracked and are routed correctly. check for leaks at throtle body, intake manifold, egr valve and pcv system. also check to make sure pcm is grounded correctly. Check injecter harness connectors aswell.... Hope this helps if all this looks good... you may have to take it to a shop where they can make sure the injecters are firing and compresion is correct.

Good luck :)

replace the crank sensor behind the egr valve. it worked for me after i spent nearly 500 on other sensors

I agree, jumped timing. Check to make sure the dist is tight. Than check for tdc on the #1 cylinder. When the #1 cyl is TDC the rotor should be pointing to that wire on the cap. Take the cap off while checking. Also is easier to turn motor by hand without plugs in motor.

i would say its a missfire probally a bad plug,wire ,cap ,rotor or a combination if your brave (ok maby a little crazy) put your hand on your distributer while the car is running did you get a shock you found the problem bad wires