First, thanks for all the great info you folks share, I have a 1995 5.8 with 120k and no mods. The truck was running great and then started a very intermittent miss after it warms up. Since it had the original plugs etc, if figured it was time for a tune up. I replaced plugs, cap, rotor, all motrocraft, but the miss stayed the same. It will miss crusing around 40 or sitting at a light. Seems random and can go minuets between. So next I replaced the wires and assured I routed based in info I searched here. Same exact miss. Well I did not want to start throwing parts at it so I took it to the Stealer (I mean dealer) 100 dollars later, they say they ran power balance? and everything is correct, again, no codes so nothing seems to be wrong. They actually said this is typical for my vintage truck. I could not believe they said that after 15 years of solid running. Anyway, I read identical symptoms in one of the threads and it was fixed by replacing the coil. I now have a new coil and the same irratating miss. Not sure where to go next. I did have TPS replaced six months ago and read it may be O2 sensor starting to fail. Any hints on which sensors (my best guess is I have a sensor breaking down) and how to test them or shuld I just put up with it untill I get some codes (argh) Any help would be appreciated

 

Have you gone thru the fuel system ? Compression check ?

A good informational site to have on hand -

http://fordfuelinjection.com/

 

yea check the basics. check the fuel pressure, make sure each cylinder has spark and compression. how olds the fuel filter? have you cleaned the maf?

 

I have not personally gone thru fuel system, I will replace the filter as it has been a while and clean the MAF as soon as I get back in town as well as chk pressure. The truck runs smooth the vast majority of the time and only has this irratating bump (miss) after running a while and then very intermittently wether moving or sitting still at a light. It does not appear to miss at idle when in park.