Cummins ISL hiccup
Ours is an 03 Cummins ISL with 20K miles. Just serviced with new filters before a trip form Fla to Utah. It ran perfectly until the 4th day when it started to develop a very brief sudden loss of pow...
Forum Discussion
stillthinking99 wrote:
Hershey, my local shop had my motor home for three days to install a fuel pump. It was $90 per hour and the rebuilt pump was discounted to $1,800 (working from memory here) you got a fuel pump for $540......I want a do over! I know, they didn't work on it all three days I was waiting my turn.
Putting my diesel mechanic hat on here......thats scarry.
After my ordeal I learned the following:
1. My Cummins has two fuel pumps. The primary (the one I had replaced) and a secondary pump which they called the injector pump, I think.
The primary is a small unit mounted to the side of the motor and is only $178.00. It supplies up to 150 gallons an hour...who can afford that.
The secondary pump is located somewhere else and the cost for that puppy is $2000.00 I was told.
So I got lucky, it was only the primary pump.
Also learned:
When the primary pump quits working, the secondary pump will continue to suck diesel thru the pump and let the engine to continue to run, but poorly and without power. If that is allowed to continue, it will indeed cause the secondary pump to fail and of course that will cause a complete shut down.
Sounds like the fuel pump you had replaced was the secondary pump or injector pump.
