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
sofar-sogood wrote:
Finally figured it out, the primary is a 2 micron and then the secondary is a water separating 10 micron. I took off the 2 micron and dumped the fuel from it and it was clear. I then cut the filter open and found it to be fouled with a black very fine looking power like material. Changed both filters and cleaned the Winn filter and ran it 250 miles with no issues. Picked up some extra filters just in case it happens again. Now Im wondering about the generator filter?
Actually, I hope you have your terminology incorrect, as the filters would be backward if installed as you state.
The PRIMARY fuel filter is the first one the fuel gets to from the tank. It is also the water separator and has the course micron rating (10-30 is fine). Next, the fuel goes to the lift pump.
The SECONDARY fuel filter is after the lift pump and is the fine filter (2 micron in your case).
I have seen them installed incorrectly, that is the reason for the post.
