Rick's Free Auto Repair Advice

P1272 P1274 P1276 P1278 P1316 F-450

Fix code P1272 P1274 P1276 P1278 P1316 F-450

If you own a Ford F-450 with the 7.3L engine and it’s hard to start and once it starts it misfires, here’s what to check out. You may have a loose connection of the UVC harness at the valve cover. Start at the left hand (driver’s side) valve cover and disconnect the engine harness. Check the resistance from terminal 5 to terminals 3, 4, 6, and 7 in the connector at the valve cover. This checks the resistance of the injectors. The readings should be 2.5-4.5 ohms. If the resistance is high on any injector, remove the valve cover and check for a loose UVC harness to internal gasket connection. If it is loose, contact a Ford dealer for a new locking clip 2C3Z-14A163-AB and install it.

© 2012 Rick Muscoplat

Posted on by Rick Muscoplat


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