250 LOPING, and rouph

[firediesel]

My 04 6.0 is loping and sounds like it's missing. I ran the codes and came up with P0261 and P0282. Checked all of the 4 prong injector plugs but no Help. Can anybody tell me what whats next??

[mschn99]

that is #1 and #8 injector cuircuit problems. the first thing i would do is pull the FICM off the valve cover on the drivers side and inspect the harness for any signs of chaffing or rubbed throught wire insilation........but for further diag you would need a scan tool capable of running a buzz test and a cyleder contribution test.......

[firediesel]

Well I tried unplugging the wires off of the FICM and checked all The wiring harness to each injector. Everything seems to be in check. Still pulling up the same code. However the po261 went away. Truck still runs like crap from a misfire. Any other suggestions before I take it in. Thanks for the help!!

[mschn99]

Originally Posted by firediesel

Well I tried unplugging the wires off of the FICM and checked all The wiring harness to each injector. Everything seems to be in check. Still pulling up the same code. However the po261 went away. Truck still runs like crap from a misfire. Any other suggestions before I take it in. Thanks for the help!!

sounds like you may have injector problems......BUT

Try tapping on the FICM at a medium level....dont "whack it"...but dont tap on it either...use a rubber mallot...see if that helps....

[firediesel]

Tapping on it didn't do it " always seems to work on T.V.). I brought it into the dealer a month ago for this problem. They said they cleaned the electric injector plug on the # 8. I got it back and it ran fine. Do you think the injector is bad, or would I need further testing diagnosticaly.

[mschn99]

Originally Posted by firediesel

Tapping on it didn't do it " always seems to work on T.V.). I brought it into the dealer a month ago for this problem. They said they cleaned the electric injector plug on the # 8. I got it back and it ran fine. Do you think the injector is bad, or would I need further testing diagnosticaly.

there is a good chance the injector is bad, but i would NEVER replace a hard part without first testing the system..........it could be a bad ficm, corroded wire, broken wire, or a ton of other things potentially....

[firediesel]

Thanks Marc for the good advice.