Join Date: Aug 1999
Location: Ontario, Canada
Just another thought on this subject, if a liquid that is under pressure raises the boiling point, then a liquid that is subject to a vacumm lowers the boiling point, The mechanicasl fuel pump is a great vacumm pump, it pulls and pulls or creates a lot of vacum.
If your tank is not vented then the whole system from the cap to the pump is under a vacum, but since you remove the gas cap, and still have the same problem then the vacum has to be within the fuel line, is it possible the pick up sock inside the tank is torn and plugging the lines, Check the fuel line carfully from the tank to the pump, has it been crushed or kinked, is a rubber hose colapsing into itself, I think you will find your problem in the line some place.
Let us know what you find, we are all interested in the soultion.