Lope at Start up? VP44?

[CTcummins24V]

I'm having similar issues. This weekend, I'm swapping out my 60s (I think 6 hole) for 100s (7 hole) and new connector tube o-rings. I'll report back... 

[JAG1]

Two trucks that lope at Idle........Have you guys checked for tank vacuum when removing the fuel caps? After a run remove the cap to hear for any the hiss or air running into the tank.

 

How about the screens in the tank and the other small canister shaped plastic screen filter in the module? Have you cut those things out yet. Sounds like a fuel delivery problem like fuel pressure bounce  sort of like water hammer in piping if that applies.

[CTcummins24V]

Mine doesn't lope. I have the same problem Mulcher has where the truck almost stalls out when put into gear from a cold start.

[JAG1]

Mine started doing that on a long trip heavy haul so I let it idle in neutral for about 10 seconds before putting it in gear. If I could let it roll first that seemed to help stop the stalling also. Problem went away on it's own eventually. I understand that neutral gets the trans fluid pumping throughout the trans better when not underway.

Edited October 1, 2014 by JAG1