moparman1970

Turns out after a mess of trouble shooting for the Thoroughbred guys they had me send the pump back to the pump shop in Illinois and yep it was a faulty pump. The guys at TB were pretty helpful in everything and are actually going to recoup some labor costs for me. I don't know what the best route is for a vp swap. Thanks for the posts and inputs on this issue.

I Bought a reman vp44 pump combo set with the lift pump and fuel filter from Thoroughbred Diesel and I am only getting 12 psi pressure at the fuel filter out of the new carter lift pump. The truck runs good till you start driving under a load the pressure drops down to 7or8psi and it throws the 1689 no communication between the ecm and injection pump. Did I just waste money buying the combo with this carter lift pump? Has anyone else dealt with Thouroughbred before?