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This is probably going to sound stupid and I admit I am grasping at straws, but since you tore the WUR apart (that is what you did right?), is there a chance you did something wrong or maybe hooked it up backwards (I am not sure if you even can but I can't remember for sure)? I really am having a hard time trying to see what would cause low pressure after the pump is off as the orifice should allow pressure to equalize above and below the piston.
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German autos: '79 911 SC, '87 951, '03 330i, '08 Cayenne, '13 Cayenne
0% Liberal
Men do not quit playing because they get old.... They get old because they quit playing.
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