7.3 rough idle and 1316 code

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Apr 2, 2020 | 09:06 PM

Ogsweatyyeti

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7.3 rough idle and 1316 code

Hey y’all I’m new here and my trick is giving me fits. For the past fews weeks while driving my engine would start to misfire a bit and the check engine light would come on. Three seconds later it would run fine and the light would go off. Two days ago it started to run really rough and the check engine light stayed on while the truck was running. I took it to a local shop and had them pull the codes. Codes are:

P0603 - Internal control module keep alive memory error.
P1316 - Ignition driver monitor codes detected.
P1139 - Water in fuel indicator lamp circuit malfunction.
B2658 - Wait to start earning indicator circuit open.
U1267 - SCP data fault from J1850 Bus.

I’ve read and watched videos on the P1316 until my eyes bled and assumed that the majority of the problem starting there. So today I replaced the UVCH and glow plugs. Fired it up and it is now running worse. Any ideas of what the heck is going on??? Help is much appreciated!

Thanks in advance!

Justin

Apr 2, 2020 | 11:19 PM

CathedralCub

FTE Community Team

Joined: Jan 2019

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You'll probably want to post this issue in the "1999 - 2003 7.3L Power Stroke Diesel" forum. They'll have some good assistance for you over there.

Welcome aboard!

Apr 3, 2020 | 09:03 PM

donjamer

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Joined: Aug 2005

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From: MA

Moved to appropriate forum

Apr 3, 2020 | 11:19 PM

pirschwagon

More Turbo

Joined: May 2016

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First, you may want to retrieve codes specific to the IDM. The most likely cause is in the HV Wire Harness from the IDM to the Injectors. Generally occurring on the DS Valve Cover where it rubs. Pay special attention to the connectors as well. Others include the Valve Cover Gasket Wiring and Connectors. Without the Codes, you're chasing a Rabbit down a Hole.