Fuel Filters change ISC Cummins
My 2005 Cummins ISC has 2 fuel filters. One has the water sensor and drain which Cummins manual says is the suction filter and the other is the pressure filter. I changed both filters but according to...
Forum Discussion
Both of mine are on the suction side and the water sep one is low enough that fuel keeps coming out when I take it off. I immediately put a dry filter on and only completely tighten once fuel starts to overflow. I thought my second filter was on the pressure side but in trying to help a friend with a problem I loosen it and had the DW turn the key on expecting to have fuel on the rag I'd put around the loose filter. It's on the suction side too and I've never put it on with fuel in it...cycling the key 4 times for the 30 seconds the lift pump runs before shutting off. Has always started immediately.
