rough idle

[dj]

Has anyone had a problem with the engine rolling at idle? It sounds like a Detroit Diesel with the buffer screw turned in too far. The lift pump pressure gauge goes berserk and looks like the needle will bend on it's stops. This has happened three times in 20,000 miles, one time it lasted 100 miles while pulling my R. V. trailer.



The last time it happened, I checked the return fuel regulating valve on the injection pump, and found the ball not seating properly. Replacing the valve seemeed to remedy the problem until today. Cycling the ignition switch, like when filling the fuel filter, seems to make the problem go away. Several times, when starting, the engine would start to lope and then straighten out. I have not been able to get the truck to a dealer and have the problem occur.



HELP!!!



Dean Jager

-- email address removed --





2001 quad cab; 245 hp 6 spd; gauges; white w/ tall camper shell

 

[Shooter]

Sounds like you found the problem, now the hard part. Getting a stealer to be able to fix it. If you fuel pressure is all over the gauge then it could be lift pump or VP44. You might consider taking it to your local Cummins Dist. ( Southwest Cummins, superb people ) for a quick diagnosis and proper fix. It won't be free but it will be done correctly. Or just to trouble shoot and than take it to DC for the may be proper fix by gaser techs.







2 stroke Detroits " HUNT " : they don't roll.

 

[dj]

As suggested, I contacted Southwest Cummins and they said that they were aware of the problem, but they did not know the cause. I was told that several people had complained of the problem, but they felt it was more of an inconveince than a major problem.





Dean Jager

-- email address removed --





2001 quad cab; 245 hp; 6spd shell; gauges; 50 gal. aux. fuel tank 2w. d.