Car runs great but it starts hard having to pump
This problem is caused by in most cases the fuel pressure bleeding down when the engine is shut off, this leads to air in the fuel line because the fuel leaks back to the pump and then into the fuel tank. The fuel pump is electric and it has a built in fuel pressure check valve in the pressure outlet of the pump. To confirm this is the problem you must have a fuel pressure leak down test run, the test port to check fuel pressure is on the top of the engine in the pipe that supplies fuel and sets over the top of the fuel injectors. You can purchase a fuel pressure test gauge from most auto parts stores for about $20.00. Hook the test gauge up to the test port (it looks like an oversized tire valve) start the engine and verify you have no leaks at the connection of the gauge, once that is sealed and has no seepage of fuel note the fuel pressure at idle, shut the engine down and watch the gauge, it should not drop more than 4 pounds in one hour, in most cases it will drop off right away. If the fuel pump is the problem you will need to replace it, to do that requires you drop the fuel tank down out of the car, this is a very difficult job on the ground, you will need to raise the car as high off the ground as possible, support it on jack stands and then with a hydraulic floor jack support the fuel tank and remove the filler neck then remove the two steel straps that secure it to the cars underside, once the straps are off slowly lower the tank and remove the fuel lines and the electrical connector from the fuel pump/sending unit connector, then remove the tank and remove the retaining ring that holds the fuel pump/sender module inside the tank. Reverse to assemble, then put at least 4 gallons of gas in the tank to prime the pump.
on Jan 08, 2012