Having a prob with my 94 ford f250 non turbo. I just replaced (a few months ago) the injection pump(reman), injectors(new not reman) ,glow plug controler, return line kit, k&n air filter and fuel pick up pump. After replacing all of this the motor seems to shake like its missing on a cyl or 2.When its cold and warm. I also noticed that fuel milage may of went down. I know for sure that i have a bad glow plug some where in the system. I also put a clear line on the returen line to see if it was sucking air and that had no bubbles. How would i check to see if a injector is bad? Or what else would be up with it? Thankz Joe

 

when running, feel the injector lines. see if any of them are hotter than the others.

to kill a cyl, with the motor running, loosen the injector line. if the engine doesnt change tone, you found the cyl.

injectors can be bad new. it happens.

 

i guess i better check this out its been almost 3 months from when i got them. But i dont run it often

 

checked the injector lines today. All had a rpm change when i losened them. I also checked the temp at the exhaust port with a digital temp gauge and they read between 165-180 give or take a few deg.
I also checked to see if the injector lines were warm and non of them felt hot.

 

hmm... try installing a new fuel filter with a dose of dieselkleen in it. run the truck for 2-3 mins then shut it down. now the cleaner is in the pump. let it sit for 15 mins or so and then run it. see if that helps.