General Discussion     Tech Questions     Parts & Services     Suggestions/Ideas     Help & Website Instructions     Blogs    

Truck & Transportation History

Home Search Tags


Military Silver Series 8v92 DDEC IV surge

Posted By mrwrenchhead Sunday, December 30, 2018 4:49 AM
Add to Favorites0
Author Message
mrwrenchhead
 Posted Sunday, December 30, 2018 4:49 AM
.

. - (44 reputation). - (44 reputation). - (44 reputation). - (44 reputation). - (44 reputation). - (44 reputation). - (44 reputation). - (44 reputation). - (44 reputation)

Group: Forum User
Last Active: Thursday, January 03, 2019 8:25 AM
Posts: 1, Visits: 5
44
Hello all,

I am having problems diagnosing this engine, no codes are displayed, I have disconnected all sensors, replaced the following: fuel filters, ECM, Accelerator pedal with TPS, PTO switch, and wiggled wires. The issue; the truck will be fine when first started, then after it is warm, it will begin to surge between 2-3 thousand RPMs. Even in gear which you know is a hell of a fight to keep it from running over something or someone. I do not have a Detroit pro-link module, but have a tool that does connect and I cannot spot anything out of the usual - it is limited what it can monitor. This is in a M978A2 refueling truck. Boss said no to sending this to Detroit for troubleshooting. This truck appears to be about 10 years old. I have leaned to electrical issues because it acts up when warm, like a solenoid would fault. Even thought about collapsing fuel line. Any suggestions would be appreciated. I have not put a mechanical gage on the fuel pump as of yet due to needing to reassemble the donor truck.
4bangor
 Posted Thursday, January 31, 2019 5:30 AM
.

. - (20,788 reputation). - (20,788 reputation). - (20,788 reputation). - (20,788 reputation). - (20,788 reputation). - (20,788 reputation). - (20,788 reputation). - (20,788 reputation). - (20,788 reputation)

Group: Forum User
Last Active: Saturday, February 09, 2019 2:41 AM
Posts: 298, Visits: 3,585
the surge is caused by the governor control. my guess at 2500 RPM.

Similar Topics

Expand / Collapse

Reading This Topic

Expand / Collapse

Back To Top