Hello,

As you can see this is my first post/thread, so thank you in advance for any help.


I was driving my F250 7.3L DI Turbo truck and while slowing down at a red light the engine began idling really rough, the truck was shaking violently. I turn it off and turn the truck back on, and all is good. I hit my brakes again and the rough idling returns. I have the truck towed back to my place.

Here's what I've checked first.

After letting the engine idle for a couple of minutes, the passenger side exhaust manifold was hot, driver side was cold.

-UVCH, i have the version that is 2 5 pin plugs, and from what I can gather, those are not as prone to failure like the 9 pin connector (correct me if i'm wrong). I've replaced the gasket and harness (the one under the valve cover)

-check fuel filter, looks clean

-Checked the OHm's for the injectors at the IDM. performed the GB tech bulletin 103. everything seems fine. they were all 2.9.

When i go to start it up, with the valve cover off (only the drivers side), injectors for cylinders 2,4, and 8 are not shooting out oil from the poppet. Cylinder 6 is shooting oil.

I'm stumped at what could be happening. any thoughts?

 

Took IDM in to get checked. One of the diodes (i think) was completely useless.

There was no sound of water.
Will replace IDM and will report what happens next.

 

It was the IDM. Replaced it and truck is working good.

 

welcome to FTE
it is good to hear you got it fixed, and before anyone could give you suggestions too.