2003 7.3l runs rough
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2003 7.3l runs rough
I have a 2003 F250 7.3L. I put new injectors in my truck four months ago and all of a sudden, I have 2 cylinders not working correctly, making the truck to run really badly. I sent the 2 injectors from the bad cylinders back for warranty and they replaced both of the injectors but nothing was wrong. I put them in and the truck still runs badly. I have a new fuel filter, new ICP, new CPS and glow plug relay. Any ideas, I cannot drive the truck, it smokes white at idle, thanks.
I can unplug each injector at a time and cyclinder 5 does not change how the truck runs
I can unplug each injector at a time and cyclinder 5 does not change how the truck runs
Fleet Mechanic
Joined: Aug 2006
Posts: 1,465
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From: Jacksonville, FL
Do you have a way to connect to the PCM and check data / pull codes?
Have you checked the wires coming from the 42 pin connector on the drivers side valve cover? They have been known to rub on the VC and cause issues. You can also ohm everything out from here to to make sure you have continuity through the wiring system
Have you checked the wires coming from the 42 pin connector on the drivers side valve cover? They have been known to rub on the VC and cause issues. You can also ohm everything out from here to to make sure you have continuity through the wiring system
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Fleet Mechanic
Joined: Aug 2006
Posts: 1,465
Likes: 17
From: Jacksonville, FL
What are you using to pull codes? Not all OBD II scanners can connect to these trucks as they are not fully OBD II compliant.
What else have you done to troubleshoot the issue?
What else have you done to troubleshoot the issue?
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Checked
We used a SnapOn reader, my OBD2 Bluetooth reader and my superchips tuner (returned to stock). Ohm all of the injectors, put new uvch on and gaskets, checked fuses, and looked for damage wires
Logistics Pro
Joined: Oct 2011
Posts: 3,953
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From: Mcdonough, GA
have you ohmed wiring from the IDM connecter? Checked that connector for corrosion? Checked the harness to the 42 pin connector, especially where it crosses / rubs the diver side valve cover to ensure no damage?