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Discussion Starter · #1 · (Edited)
Here is what has been done so far.
New engine wire harness
New uvch
All new injectors and glow plugs
New IDM
All compression around 400
Have check fuel system for clogs and pressure. It's good.

My problem is #2,6,8 injectors are not firing.

Could it be bad pcm or IDM?

2001 excursion 7.3 325,000 miles

Any help is gonna be greatly appreciated for this truck is about to drive me crazy
 

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Discussion Starter · #2 · (Edited)
More info. I have snap on scanner that tells me after each buzz test IDM is fault.
Also gp circuit fault.
It is a Cali emissions truck.
Anyway to test IDM or pcm?
 

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Discussion Starter · #4 ·
Talked to swamps and they say because it will pass a buzz test that the IDM is good. My scanner says failed IDM.
At the end of my rope with this truck. Any ideas of what else to check?
Also does anyone know how to make a noid test light to check if IDM is firing injector.
 
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