Injector reading open
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Cross-Country
Joined: Oct 2013
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From: Eastern Washington State
Injector reading open
I used these instructions to check my injector solenoid resistance. 6 of mine read in the 3.6/3.7 ohms. #7 read 4 ohms. #2 read infinity (open).
How should I proceed from here?
I'm an artist, not a mechanic, but I've done things like replaced an engine and a couple of transmissions so I am not helpless. Just clueless
1999 7.3 power stroke super duty. My first diesel.
How should I proceed from here?
I'm an artist, not a mechanic, but I've done things like replaced an engine and a couple of transmissions so I am not helpless. Just clueless
1999 7.3 power stroke super duty. My first diesel.
Last edited by WoodHacker; Sep 12, 2014 at 05:00 PM. Reason: spelling
Lead Driver
Joined: Jun 2004
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From: Amarillo, TEXAS!
Pull the valve cover outer wiring harness connector and recheck it from there. If it's open there as well, pull the valve cover off and make sure the inner connector is seated. Start with that, and see what you come up with.
Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
Great job finding the thread and using it! 
The most common cause of your problem is a bad Under Valve Cover Harness. You can test the continuity from the valve cover connector before diving in, but the UVCH problem is overwhelmingly common. Some people do the fifty-cent mod (install a spreader on the UVCH locking tab), but I've seen a few of those fail. If you enjoy wrenching on a diesel and want to try it for almost no cost - do the mod and try your luck.
I tried it on two trucks, and they both failed. I now preach "Replace both UVCHs and be done with it."
The most common cause of your problem is a bad Under Valve Cover Harness. You can test the continuity from the valve cover connector before diving in, but the UVCH problem is overwhelmingly common. Some people do the fifty-cent mod (install a spreader on the UVCH locking tab), but I've seen a few of those fail. If you enjoy wrenching on a diesel and want to try it for almost no cost - do the mod and try your luck.
I tried it on two trucks, and they both failed. I now preach "Replace both UVCHs and be done with it."
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Cross-Country
Joined: Oct 2013
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From: Eastern Washington State
FIXED 
I proceeded with your suggestions and when I started to lift the valve cover gasket from the head, the wiring harness plug fell away from the gasket connection. That was the problem. Rather than plug it back in and hope for the best, I bought a new harness from NAPA ($70 China made) and installed it. TRUCK RUNS GREAT NOW!
This new harness is hardwired to the inside of the gasket and the wires appear to be smaller than the one I removed. I didn't care for the smaller wires.
Thanks for the help
I proceeded with your suggestions and when I started to lift the valve cover gasket from the head, the wiring harness plug fell away from the gasket connection. That was the problem. Rather than plug it back in and hope for the best, I bought a new harness from NAPA ($70 China made) and installed it. TRUCK RUNS GREAT NOW!
This new harness is hardwired to the inside of the gasket and the wires appear to be smaller than the one I removed. I didn't care for the smaller wires.
Thanks for the help
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