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Originally Posted by bwheitman
That is really strange. I would test the fuel pressure at that angle, I would guess you can hear the pump going? Is it sucking air? don't forget there is a bowl in the tank to prevent the fuel pump from sucking air while in curves or angles, maybe that is defective. Overall a pressure test while at an angle that creates the problem will tell you a lot. Has the fuel filter been replaced regularly? That can weaken a pump, maybe it is just on it's way out.
Good luck!
Brian
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Thanks for the quick response, to answer your questions... it is indeed strange, I can't check the pressure right this min as the car is located about 60miles from where I'm at so this is diagnosis on the fly. (really hoping someone had experienced this before and had a quick easy fix). The pump does run, and you can move the car to where it's not at an angle and then it will start up and run like usual.
Also, I realize these cars had issues with getting the correct fuel filter for them, so with that said, I replaced the fuel filter a while back and it made no difference. Did the same thing before and after new fuel filter.
Could you please explain what you mean by "bowl in the tank"? Is it the expansion reservoir you are talking about ? Or are you talking about the pickup tube ?
The car runs absolutely fine all of the time, no problems with acceleration and drives like a dream. It's just when it's parked on a slight downward grade (front-end facing down) and has sat for a while (4-6hrs). The symptoms are that of a pump that lost it's prime for some reason.
Also, does anyone know exactly what the Fuel pump check valve does for the system in question ? Does it maintain system pressure while the car is off, ie.. keeps the pump primed ?
The fuel pumps are pretty pricey for these things, so I want to figure out what it is before I tell him to start throwing parts at it. LOL
I sold him the car so I feel obligated to help him fix it. Thanks for your continued help
TJ