7.3 skip. No codes
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Elder User
Joined: Sep 2012
Posts: 611
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From: Smokey Mountains TN
7.3 skip. No codes
hey guys,
i broke down last week with the truck shutting off and no re-start.
after towed home, I put in a new CPS, but no start .. did a&e Test and had several injectors high circuit and idm failure. I changed idm with an old one I had of unknown condition. Truck restarted, but skipping while driving and injectors seem to be noisy.
a&e no issues.
replaced IDM today with a known good one and still same skip.
buzz test normal, koeo test pass, koer test shows past .
any thoughts, advice ? Thanks
i broke down last week with the truck shutting off and no re-start.
after towed home, I put in a new CPS, but no start .. did a&e Test and had several injectors high circuit and idm failure. I changed idm with an old one I had of unknown condition. Truck restarted, but skipping while driving and injectors seem to be noisy.
a&e no issues.
replaced IDM today with a known good one and still same skip.
buzz test normal, koeo test pass, koer test shows past .
any thoughts, advice ? Thanks
Thread Starter
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Elder User
Joined: Sep 2012
Posts: 611
Likes: 0
From: Smokey Mountains TN
I don’t think I can get the truck hot enough. I would also believe a worn injector would show up slowly. This issue appeard all the sudden with a no start at first . And something took out the first idm, because it is definitely not running with the idm that left me stranded ..
would a bad PCM or a bad uvch show up on a&e ?
the only thing I am getting as an error is the exhaust pressure sensor .. I cleaned the pipe out, but think the sensor might be faulty .. says out of range ..
when unplugging that sensor , still no
issue with the skipping.
would a bad PCM or a bad uvch show up on a&e ?
the only thing I am getting as an error is the exhaust pressure sensor .. I cleaned the pipe out, but think the sensor might be faulty .. says out of range ..
when unplugging that sensor , still no
issue with the skipping.
Senior User
Joined: Nov 2006
Posts: 222
Likes: 0
From: Sayreville, NJ
a injector solenoid could take out idm. It is also possible to have a bad injector solenoid to shut down entire bank of injectors. Also take off oil fill cap and smell for burnt wires. Could have fried UVC harness
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
Can you describe skipping? Maybe going down the road then you seem to loose all power (quiet) for a split second then the truck jumps forward? If so that usually is the CPS, it does not usually throw a code. On the 97 when I started to have UVCH issues it was pretty apparent, no power to one bank, and scanner did show codes.
Thread Starter
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Elder User
Joined: Sep 2012
Posts: 611
Likes: 0
From: Smokey Mountains TN
when I drive , it is not a complete shutt down type skipping . Just some of the cylinders the way it feels . The sound when accelerating almost sounds like spark knocking in a gas . It’s more noticeable under load , then just rolling .
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