Noisy Lift Pump
Purchased our 2003 36FDDS/400ISL in August, 2011.When we started our spring maintenance items in 2012, the “engine” idiot light came on.We added this to our list of items the local Cummins Northwest shop was going to address.It turned out to be a bad lift pump (vehicle always started right up) which was replaced for only $100.00 deductable.Glad we had an extended warranty.
Fast forward to November, 2013 and “engine” idiot light comes on (again, vehicle always starts right up).Back to Cummins Northwest where I’m told the lift pump is again bad.This pump had only lasted 18 months and 5,500 miles.A replacement costs the $100.00 deductable, but no amount of discussion or letters to the home office gave any type of credit to either parts or labor.No explanation as to why this might have happened so soon, either.
Forward to May, 2014 and the snow is gone:I noticed when I turned the ignition key clockwise to accessory (not ignition yet), all the status idiot lights come on and buzzers buzz - both for a few seconds.But, I also get a loud (loud enough to be heard up front) electrical buzzing/pumping noise from the engine compartment.I’ve lifted up the bed and had the DW turn the key and I can definitely hear the noise from the pump and feel the vibration within it.
Back down to Cummins Northwest where they tell me everything reads out normal on the lift pump.
Is this lift pump noise and vibration normal?I just don’t remember it being there previously.I’ve timed it repeatedly, and each time it goes for exactly 60 seconds and then stops.Any past experiences or suggestions out there?
Bruce & Donna, plus 2 Rhodesian Ridgebacks
2003 Alpine Coach 36-FDDS, WA, MT & OR