Compression Ignition Addict
Join Date: Feb 2008
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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!
1997 Ford F-350 4x4 SRW regular cab manual trans.
-Rosewood 160cc, 17*HPOP, EPBV delete, 4.10s, 315/75r16
1996 Ford F-350 4x4 SRW CCLB manual trans. CALI spec
-ATS intercooler, WW2 w/ 1.0 housing/EPBV delete, Comp 910s, SD Efuel, 3.55s, 315/75r16
2002 Ranger FX4 with manual transfer case and Alcoa's