My truck started running very rough on the way home a few weeks ago and the service engine soon light came on. Truck has absolutly no power. If I feather the clutch and start in low gear I can get it going without stalling.Went and had it cecked out and they said there were problems on the drivers side bank with 3 of the cylinders. Said it was probably a bad injector or two. They gave me 4 good used injectors to try, I swaped them out but I still am having the same problem. Sometimes when I start it up it runs fine for 5-30 seconds and then it drops the whole drivers side bank of cylinders. Oh and there is no exhaust temp on the drivers side. Manifold it stone cold but the pass side will be nice and warm/hot. I am stumped! I have replaced the UVC harness on both side within the last 2 years, just changed the oil, and fuel filter. Mechanic gave me a good used IDM to try and that didnt help either.HPOP has 630 psi at idle and I believe the mechanic said 2600 psi at higher rpm. Truck is a 00 with 175,000 on it. Sorry if this is a little chopped up, english was never a strong subject for me. Any help Is greatly appreciated!!

 

Check harness outside of covr unplug clean reconnect or just replace also chek gaskets for continuity...

 

Classic UCV harness issue...

 

The gasket has been replaced less than 2 years ago. I have had this side apart and back together 4 times in the last week. I did check the gasket for continuity and it seems to be ok. Is there a way I can check the main plug that goes into the gasket for power?

 

Yea trace those main ones back too that 40 pin harness connector on the drivers vc then chek them just like the gasket

 

Thanks. Ill go check that out now.

 

Hows your fuel level?

Luke

 

Checked the main connector on th drivers side valve cover to the 40 pin and all seems to be good. Fuel is at 3/8 of a tank.
Going to change the gasket out now just for the heck of it.

 

befroe you change the gasket, look at it. does it look like it's shorted out, or does it smell burnt?

 

Look inside and outside of the valve cover. Check the under valve cover harness as well. If you have swapped the IDM, and you still have one side not running its that harness or something on that side.