ok again I apologize if this horse has been beat to death, but it always seems easier to ask my questions than do a search . So here it is;
Dropped the tank awhile back to clean it out. now after installing the pump back in, the fuel gauge only reads to half a tank. I removed it and checked the fuel sending unit and it seemed to measure properly on the meter. next issue that appeared, is it looses its fuel prime the longer it sits. and makes it a long crank to fire up. I should mention that I have an airdog pump on board and an edge/attitude. seconds after firing up, fuel pressure drops to zero or near zero for a brief second then jumps back up to 15-16 psi. it also is 15-16 while it cranks.

 

If you have seemingly created a leak right after dropping the tank whereby now loosing prime I would first suspect the quick connect fittings on the top of the fuel module arent sealing properly.

 

^^That was what happened when I did mine......