Posted by Tim Way on Thursday, April 01, 2004 at 1:17AM :
In Reply to: Cummins fuel pump problem posted by CJ in AK on Wednesday, March 31, 2004 at 3:45PM :
Make sure they check your lift pump pressure both at idle and WOT. There are specs for both.
There is a theory over at the TDR and the DTR that the lift pumps fails and doesn't pump enough excess fuel to cool the injector pump therefore causing the injector pump to overheat and fail. The lift pumps are a known weak link in the electronic injected 2nd gen trucks.
If your dealership keeps replacing the injector pump with a bad lift pump, that could be the problem.
Good luck!
Tim Way
Albuquerque, NM
Follow Ups: