DanG144
Top Post Dawg
IF this is on the 2005 wagon, then I would measure my fuel return flow. Ensure it is over 800 ml/minute at idle if you have a Bosch gear type tandem pump, ensure it is over 1000 ml/minute if it is the LUK tandem pump it came with.
Ensure someone has not crossed up the fuel lines. This causes low return flow with the pump hooked up, even if it has good return flow dumping into a bottle. It has happened before. Blue piping or marking is return flow lines. Pay attention to the arrows on the fuel pump assembly top that show direction.
Ensure your lift pump actually does pump. Hot wire it and you should get over 3 liters per minute from the pump into a jug.
Ensure the lift pump is actually running during engine run. Lift the seat and listen.
Lastly, a bad thermo tee on your fuel filter can cause temperatures this high.
Mk IV BEW fuel system testing. Look in post #7 for a link to a pdf.
Ensure someone has not crossed up the fuel lines. This causes low return flow with the pump hooked up, even if it has good return flow dumping into a bottle. It has happened before. Blue piping or marking is return flow lines. Pay attention to the arrows on the fuel pump assembly top that show direction.
Ensure your lift pump actually does pump. Hot wire it and you should get over 3 liters per minute from the pump into a jug.
Ensure the lift pump is actually running during engine run. Lift the seat and listen.
Lastly, a bad thermo tee on your fuel filter can cause temperatures this high.
Mk IV BEW fuel system testing. Look in post #7 for a link to a pdf.