Posted by wore out on February 11, 2021 at 07:39:32 from (64.255.159.199):
In Reply to: Diesel run a way posted by Steve Metcalfe on February 10, 2021 at 06:26:40:
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The (now old) GM 6.5 diesels with electronic injection will at least make an attempt at a runaway when the computer-controlled "fuel solenoid" in the injection pump gets worn and sticky. The solenoid controls duration of injection and thereby fuel rate.
I have a 1995 tonner that occasionally does that, I've had it scream to at least redline before I got it shut off.
Turning the key "off" releases a separate shutdown solenoid which cuts fuel off to the pumping plungers so it stops even with the "fuel rate" solenoid stuck.
Let it sit a while and start it back up and all will be well for perhaps many miles.
I have a re-man pump sitting on the bench, I just need to get ambitious enough to install it!
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