Hi guys, Forgive me if i'm longwinded, I'm new to this forum thing. I've got a 90 f150 302 and it
runs rough once it warms up either at idle or light gas pedal.
if you step on it it clears up for the most part. i cleaned out the
egr valve and that code cleared. then it had o2 sensor code
(42-hego high/running rich) so i put on new 02 sensor and it
doesn't seem much better. I haven't had a chance to rerun the engine on key on test yet. the only other code is 21-ect out of range. Should I get a new coolant temp sensor? I just bought
the truck and it gets 11-12 mpg on hwy. I put in new plugs, fuel
filter, rotor and cap and ran fuel injector cleaner through gas tank. Any suggestions would be greatly appreciated.