Quote:
Originally Posted by 73220downer
After a couple hundred miles the problem has reappeared. I'm fairly confident either the pump wasn't bad in the first place and I've just been very lucky for a couple weeks, or air is being let in from somewhere else. I can see bubbles in the clear line that runs from the bottom of the secondary fuel filter to the injection pump, and they would seem the originate from the IP itself. After a couple miles of driving I can see very slight seepage from out of the round things that connect to the hard injector lines. Might this be the cause?
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It could also be air getting in at the secondary fuel filter, or elsewhere. There are 2 types of filter housings with different seals used in each. The best place to look for air in fuel is a temporary clear pvc line in place of the cigar hose (return to tank). It should have a solid, bubble free non foamy stream of fuel at all times, engine running or not (as in overnight and longer). Any air that gets into the system will end up there.