Gunk in fuel filter, but tank is clean (1972 Valiant 225)

troubbble said
Just wanted to stop back and say thanks for the input - the sending unit sock had disintegrated and the unit itself was in rough shape so we replaced it. I think it may have been the source of some of the gunk. We also blew out the lines and cleaned them with CLR.

The new unit won't give us a reading so we've got to see if it's getting enough power (reads fine on the multimeter when not installed) but that's a whole other issue.

Two things:

1) Did you use the old lock ring? If not, expect it to leak, the newer ones are chincy.

2) Do you have the ground strap from sending unit to the hard line? It's a metal piece with a clip of sorts on each end and it goes from sender to hard line right at the tank (effectively creating a connection over the rubber line).