1997 4.6 112000 f150 4x4
engine seems to run fine when it first starts up but after it warms up it misses at low rpms .like when yyour just going down road and and want to speed up it will hesiate spudder for a little bit till rpms get above 2000 seems to be getting worse.
I have already changed maf sensor .cleaned my throttle body of all the carbon .just changed fuel filter . took carb cleaner spray cant find any vac leaks . Stumped whats next!!!!!

 

How do your coil & wires look? I've only had one go bad (coil), but it ran alright, but when I put a load on the engine it did the hesitation, run rough bit. Luckily, it was under 36000 miles.

 

Sounds like "the stumble"; more than likely time for plugs and wires at 112K.

 

I have the same problem with a 99 4.6 super cab auto. I just got a new fuel filter put on at ford and it is still doing "the stumble". The truck only has 53000 miles on it. is it really time for new plugs and wires?

 

Well i went and changed my plugs and that where my problem was. had 1 bad plug . Seems to be running alot better no more miss but still i think it should be better