7.3 Gurus PLEASE help!!!

smokinaddiction

Toy Builder
Joined
Sep 27, 2007
Messages
185
Hey guys, got an '03 7.3 with an issue. Truck starts hard and runs rough with a miss. Threw a p1316 code- IDM codes detected. Did a click test with a scanner from work and all pass, but when i run a cylinder contribution test it comes up with 4 codes, Cylinders 1,3,5, and 7 balance. So i got under the hood and unplugged the right side valve cover and truck ran exactly the same. Question is can a valve cover gasket go "that" bad all at once?? Or am I missing another problem?? Any help is appreciated, Thanks guys!! Dan.
 
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