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...
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I did open the thumb valve on the bottom of the primary filter and only got about a 1/4 oz of clean clear diesel out of it. I thought that there would be more fuel than that? I did that with the key off. I turned on the key and a pump near the filters ran for 20 sec or so and then I had lots of clean fuel coming out, the pump must have refilled the filter? Also I have a small switch panel with 2 push button switches, 1 says "Air purge", the other is "H2O purge". There is a green pilot light on this panel that comes on with the ignition. I pressed both switches and nothing happened with the H2O but the Air purge light came on yellow. I assume that the primary filter drains back towards the tank when not running? I guess the next step is to remove the secondary filter. I tried the belt method but it just slipped.
