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Message: [QUOTE="BigRedDiesel, post: 1169715, member: 1754"] Which wire is the common wire? Is that the Driver side Supply or the Brown/Light Blue? It's been a few days since I've had a chance to work on it. Got in it my buddy's pole barn. Spent the whole day on it yesterday and here is what we have done so far. Swapped #4 solenoid to #2 injector, replaced valve cover gasket and UVCH. Cleared Codes ran buzz test and still came up with P1274. Ran a Cylinder Contribution Test and got P0272 #4 Cylinder Balance Fault. We ohm'd the wire on the 42 pin connector with the new harness. Every came in at 3.6 for the driver's side bank. Ran a continuity test on the brown/light blue wire from the male pin side of the 42 pin connector to the connector at the IDM plug. Had continuity and ohm'd at 0.6 ohms. Replaced IDM with a known good one from another Super Duty. Plugged everything back in and ran buzz test on AE. P1274 shows up. Started the truck and ran another Contribution Test. P0272 comes back again. Couple of question: Can this in no way be a tuning issue? Something in the PCM can't be causing this can it? Am I looking at the right wire, Brown with Light Blue stripe? Do I just need to take all the loom off the harness and trace the said Brn/LT Bl wire back to the IDM? I'm at my wits end guys, I'll take any suggestions... [/QUOTE]

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