Why my Davco Fuel Pro is draining below collar and doesn't fill?
Ok, So here's the deal. My Davco does not fill up, and the level will actually drop to below the collar then rise to an inch above the next day and vice versa,but never more. Things I have done so far,
-Fuel pressure test, result OK
-Changed filter and the spring at the top of the housing
-replaced the check ball and spring at fuel inlet
-replaced gaskets and checked for leaks, none found
The last filter was in there for more than 80,000 miles and the paper was starting to break down.
The truck starts and runs fine and does not seem to have any loss of prime. Fuel is not going into the coolant. Nor is coolant making it into the Davco.
Is this a good question?