injector?

[kingbilly68]

How will I know if I have a bad injector? 01 f-250 4wd ec at. 137,000 miles

[kaya@bernhausen]

usually it'll run like crap when cold. sometimes, it'll just run like crap all the time. depends. of course, that's not to say another culprit isn't possible
what type of symptoms does it have?

[kingbilly68]

It has plenty of low end power. Loses power at higher rpm levels. Have noticed more black smoke than before when I step on it. Also, fuel mileage is only around 9.5 in town. I don't expect great in town, but that's getting pretty expensive.

[jesilvas]

You'll have to run a buzz test and cylinder contribution test to figure out bad injector or not. And half the time you get ghost codes from a CPS issue known to 7.3.
Black smoke means not enough air. Check all your exhaust connections preturbo and intercooler boots.

[kingbilly68]

Will do. Plan on installing a 6637 in the next couple of days also. Should take care of not enough air problem

[jesilvas]

No, that won't.

[kaya@bernhausen]

silly question, but have you removed and checked the air filter? could be as simple as that

[kingbilly68]

Yeah, air filter is only a couple of months old. Its still real clean.