Quote:
Originally Posted by tangofox007
The odds are about 10:1 that the check valve in the nipple on the pump has failed. The typical scenario is that the retainer plate fails due to corrosion, then the valve components rattle around in the pump inlet and cause intermittent blockage.
Disconnect the hard line at the pump, then remove the nipple from the pump. If the nipple is empty, fish the spring, plunger and retainer plate out of the pump.
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X2 on the check Valve except that when My Check Valve was gunked up I still had partial Vacuum.
I cleaned it with WD-40. Don't clean it with Brake Cleaner as it sometimes makes Plastic Parts sticky.