Injector driver mod problems
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New User
Joined: Apr 2008
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Injector driver mod problems
My '02 f250 powerstroke's engine light came on and started running real rough. I hooked up the OMBII and the read told me I had IDM problems. I bought a remanned unit, put it in and my truck still runs like crap and I still am getting the IDM code. Is it possible that the unit I bought was defective or is there another problem that could be happening?
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Welcome to FTE ranson3.
A lot of the IDM problems we see that are associated with a bad running engine come from either a loose connector of chaffed wires under the valve cover. We call this UVCH (Under valve cover harness).
You can check the wires with an ohm meter at the 9 pin connector that plugs into the valve cover. The wires in the connector are laid out as follows
G G I I C I I G G
G=Glow Plug
I=Injector +
C=Injector -
Ohm Glow plugs between "G" and Battery Negative post. Should be between 0.1 and 2.0 Ohms
Ohm Injectors Between "C" and "I" should be < 5 ohms
Here's a link with pictures that shows you what some of the problems are
https://www.ford-trucks.com/forums/2...or-wiring.html
A lot of the IDM problems we see that are associated with a bad running engine come from either a loose connector of chaffed wires under the valve cover. We call this UVCH (Under valve cover harness).
You can check the wires with an ohm meter at the 9 pin connector that plugs into the valve cover. The wires in the connector are laid out as follows
G G I I C I I G G
G=Glow Plug
I=Injector +
C=Injector -
Ohm Glow plugs between "G" and Battery Negative post. Should be between 0.1 and 2.0 Ohms
Ohm Injectors Between "C" and "I" should be < 5 ohms
Here's a link with pictures that shows you what some of the problems are
https://www.ford-trucks.com/forums/2...or-wiring.html
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
I second what F350-6 said and can back it up with personal experience.
Had the valve covers off one day for a different reason and upon the initial start up after the completion of the repairs the truck had a dead miss with only P1316 code showing.
Turns out that I accidentally hooked the retainer clip on #1 injector and it came unplugged as I was re-installing the valve cover on the engine.
Had the valve covers off one day for a different reason and upon the initial start up after the completion of the repairs the truck had a dead miss with only P1316 code showing.
Turns out that I accidentally hooked the retainer clip on #1 injector and it came unplugged as I was re-installing the valve cover on the engine.
