As per Geno's request.
Truck acted up this morning,check engine lite,stumbling,cut off once. Got code 1689-No communications between ECM and fuel pump. Cummins book says that it could be one of a couple of things. Anyone run across this before and what fixed it? Also unhooked the Comp to see if it still does it.
Truck acted up this morning,check engine lite,stumbling,cut off once. Got code 1689-No communications between ECM and fuel pump. Cummins book says that it could be one of a couple of things. Anyone run across this before and what fixed it? Also unhooked the Comp to see if it still does it.