There is a fitting after fuel filters were fuel line screws into the block. Looks like a gic/pipe tread hyd fitting but is actually a check valve. Take it apart. Surprising how much junk gets in that check valve and limits fuel flow
Cummins N-14 power????
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Ecnal regnew, Jul 9, 2016.
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