Engine Performance problem
2000 Volkswagen TDI 4 cyl Front Wheel Drive Automatic 120000 miles
I have a jetta 2000 TDI automatic that has an air in the fuel delivery hose problem. I replaced the existing neoprine tubing with transparent tubing to view since I suspected air leak issues. When the car is running, I observed bubbles from the tank supply feed, as well as from the filter to basically the entire fuel supply and return tubing. I bypassed the return valve on the filter, allowing the return gas line to flow directly back to the fuel tank, and stoppered the return valve seat on the filter, only to find more bubbles in the supply hose to the filter.
I am suspecting that the problem lies somewhere in the feed line from the tank to the filter; my questions are: what components comprise the fuel supply system from the tank to the filter - which of these components are likely to fail? How is the tank constructed? Is it possible that the leak originates inside the tank?
My best guess is that the right-angle press-on connectors are at fault, but I suspect there may be other components that could be suspect.
have the same problem?
Friday, November 6th, 2009 AT 10:58 AM