Stumble at idle....

[CSM diesel]

I just put a new VP-44 and a lift pump in a gentleman's truck. It has a stumble at idle but runs beautifully otherwise. Truck has ~260k mi and has the original injectors.

Thanks,

Ben

 

[Diesel Fanatic]

What does it have or a chip if any?

 

[Billysgoat]

Possible injector issue, maybe some trash in there?? Wouldn't hurt to yank'em out and be checked over. A new VP might make a problem show up the old one was hiding.

 

[RacinDuallie]

What kinda fuel psi is it getting? Was the filter changed also? Are ya sure all the air is out of the lines?

 

[CSM diesel]

bcumminsmech: no chip.

RacinDuallie: ~16psi at idle, new filter, pretty sure all air is out, as stated above only stumble is at idle. Runs fine at all r.p.m. except idle.