Looking for a source for a good price on a electric transfer fuel pump for a 2002 cummins 8.3 mine has started to leak and so far have only found one from Cummins.
My buddy went through the same thing with his 2002 8.3 in his Kenworth. He went so far as to get a new pump and pull the old one. That's when he found a simple loose fitting on it and he didn't need to replace it at all.
BTW, an interesting thing we found out about that lift pump is it doesn't run all the time like it does on the B engines. It just gets a flow started and then turns of after 20~30 seconds.