UVCH replaced and problem wont go away!

[DougDavenport]

I had the service engine soon light come on and my idle would drop and it would run extremely rough. Replaced the right wiring harness and it solved the problem for about 10 mins. now it is acting up more frequently and cuts in and out. I am not getting any white smoke on start up or when I get on it no white smoke...the smoke is still a steady coal color. I got several codes before I replaced the harness. P1316,P0472,P0603,P0273,P1295. I have no idea what to do next!!!!! I am trying to avoid paying the dealership a !@#$ load of money and wait two weeks like usual for them to take their sweet a$$ time. HELP!!

[MrJohnWayne]

make sure the plug is fully seated into the valve cover gasket. I had a similar problem it was not getting power to #6 or 8 injector. the plug and come half way out. Pushed it back in and no problems since..

[DougDavenport]

I dont think that is the issue because its new and I made sure the connections were tight.

[MrJohnWayne]

maybe you have a problem with the actual valve cover gasker. Is that new too?

[Huetty1]

I got simiular problem it smokes like a gray color but when you get on it it goes black and its a continuose smokin it don`t sound like its missing so i don`t think its the injectors or wire harness i replaced 8th injector and right side harness has power but smokes big time.

[DougDavenport]

will the valve cover gasket cause that? Its not new but Its an O ring type and doesnt seem to be leaking. I dont know what else to do!!!!! where is the IDM located I would like to check the connection!!!

[MrJohnWayne]

I was asking about the valve cover gasket becuse it is the bridge between the intake harness and the UVC harness, maybe the pins in the valv cover or wore out and it is not getting a good signal through the actual gasket connection..