yup gotta put this on the back burner, my P0300 code is gonna cost me $800+ to fix
I was told that 5 of my 8 fuel injectors are bad?!?!?! how does that happen?? Tireman did a OHMs test to em and said that 5 are bad!?!?!

Any body got some stock ones they wanna sell????

 

i got some stockers outta my 06 4.8, had 48,xxx miles on them, upgraded to 8.1s, u can have em for oh lets say $60 shipped??? all that p0300 is random misfires, check your plugs and wires, the smallest crack in a plug will do this

 

I did plugs and wires first, MSD wires and new delco plugs.

 

I can't see 5 out of 8 injectors going electronically bad, clogged maybe, but not open or shorted. If in fact the injectors are the prob, 06tx4.8's injectors seem like a good deal as long as they'll swap right in for you. (not sure what year your truck is and if return/returnless makes a difference, but I don't think that it does). If your truck happens to be a 99, you'll need the PCM re-tuned as 00 and up injectors flow like 24.7 lb/hr vs. 19 or 21 for the 99's.

*EDIT* just checked your first post, since you're an 04, those injectors should be a direct swap...

 

See thats what I thought too, I can see em being clogged but not shot, cuss it runs fine, little stumble on idle-kinda sounds like a lopey cam- Anyboby tried to clean em?

 

Some guys have removed them and cleaned them out with carb cleaner, but I'm not sure how successful they were...

 

If you have clogged injectors, find a shop with a Motorvac fuel system machine and have them serviced.

 

I filled up today, put 23.7 gallons in it, cleared the code and drove for 68 miles before the code came back, cleared it right there and then, drove home- hasent been on yet.

 

oh and my cam and springs are still sitting on my work bench,

 

I pulled the rails and injectors on mine. I sprayed carb cleaner into the rails, and the ends of the injectors and tons of junk came out. Good idea to change fuel filter also.
Mine did the same as yours, kinda has a lopey idle. When you step on it, it bogs down then slowly picks up.