Need a cummins mechanic

[sniper7]

It's a 2001 5.9 cummins automatic. It's my buddies who only has about 62k miles on it and having intermittent power issues. If he could call and chat with you that would be ideal. If you wouldn't mind chatting with him please send me a PM with your number and I'll have him give you a call and he can explain it.
thanks guys

[stodg73]

PM Sent

[DangerLee_Industries]

Apps hopefully and not the vp44. Have him cycle he key 3 times and leave it in the run position the 3rd time.Codes should pop where his mileage is displayed. He can call me if he wants ill pm you.

[sniper7]

Thanks guys, I gave him your numbers. I know he was working on a tractor or something right now but should call today some time.

from what I understood, it usually happens while under load, with ambient air temperature above 60-70. He will be driving along and then the acceleration power will die suddenly, but the rpms hold. He said if he pumps the gas a few times all of a sudden it comes back.
doesnt happen in colder weather. TPS sensor has been replaced and I think a few other sensors. They mentioned the fuel injector pump but it's $4500 and wouldn't guarantee it would fix the problem.

i told him my thought was the waste gate where it cuts power from the turbo. And I believe the waste gates have issues on these motors.



Should have bought a duramax!

[Great-Kazoo]

Contact redneck122.

[brutal]

Thanks guys, I gave him your numbers. I know he was working on a tractor or something right now but should call today some time.

from what I understood, it usually happens while under load, with ambient air temperature above 60-70. He will be driving along and then the acceleration power will die suddenly, but the rpms hold. He said if he pumps the gas a few times all of a sudden it comes back.
doesnt happen in colder weather. TPS sensor has been replaced and I think a few other sensors. They mentioned the fuel injector pump but it's $4500 and wouldn't guarantee it would fix the problem.

i told him my thought was the waste gate where it cuts power from the turbo. And I believe the waste gates have issues on these motors.



Should have bought a duramax!

Then he would just be dealing with overheating issues and short engine life.

[Graves]

Apps hopefully and not the vp44. Have him cycle he key 3 times and leave it in the run position the 3rd time.Codes should pop where his mileage is displayed. He can call me if he wants ill pm you.

The pedal trick won't show older codes, he needs a real scanner. My money's on the vp.

ETA: Just saw the post about hitting the throttle to clear it up, a scanner should tell you weather it needs a new apps or not, but that's a common symptom.

[sniper7]

He has replaced the TPS/APPS from what I understand and the problem is still there. Is there something wiring related that is common to short this sensor or a reason it would do it at certain temps and then come back to life by pushing the pedal a few times?

[68Charger]

Big key with vp44 equipped trucks is the lift pump... If it goes, or is weak the truck will still run but the vp44 will destroy itself... That design uses fuel to lube the pump.

Every vp44 truck should have a fuel pressure gauge, IMHO.

[sniper7]

Okay I'll let him know about that