7.3 Missing, Fails Cyl Contribution 1 and 3
Truck is missing, failing the cylinder contribution test on 1 and 3. Passes Buzz test. Shop Replaced UVCH, engine harness, IDM. When I first starting working on truck, It would fail 1, 3 and 5. Now we're down to 1 and 3. UVCH looks good, Ohms out OK. Injectors have oil coming from the spills.
I believe this to be fuel related, is there a check or restriction on the front of the head, causing these 2 cyl to not get fuel? Fuel pressure is holding at 60psi with pump running. Any thoughts, Thanks!