7.3 Super Duty with Zero Off Idle Torque

[Arisley]

OK, you know those little fittings between the fuel line and the head. Those are not just fittings, they are one way valves with super fine screens in there. Remove those, bore them out smooth with a drill bit, clean them out rally well (any tiny shrapnel left in there has to go through an injector to exit the motor). Put it back together and I bet your issue goes away. I know it sounds crazy, but exact same issue on my truck (automatic though) and on a friends truck (his was a standard). He had been chasing the issue for over a month, and he was a top notch mechanic.

 

[Petro]

Hmm that's interesting. It doesn't really seem to be starved on the top end but I'll check those out. I'll report back.

 

[houston88]

Remove the one way valves or just clean them up really well?


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[dsberman94]

Drill them out

 

[Arisley]

Drill them out

And then clean them out really, really well. You do not want any little metal shrapnel left in them at all. I used a small round file to clean it out and then a pistol cleaning kit with to push an oil soaked swab through it a few times.