A very common problem is microscopic debris building up in the tank. Chrysler pumps are built to very tight clearances to make them quiet but that allows that debris to clog the pump's impeller. The same thing happens to four or five replacement pumps. By the time you get frustrated and buy a pump from the dealer, the debris is gone and that pump keeps working. It's not the fact it was the dealer's pump. It's the fact the debris has been collected. The cure is to have the fuel tank steam cleaned at a radiator repair shop, then install the new pump.
You can verify this type of failure by using an ohm meter to measure the resistance between the two wires to the pump motor. I can't remember the colors but you can follow them from the motor to the electrical connector. If you find around 2.0 to 4.0 ohms, the motor is okay. If it doesn't run when connected to a battery, the impeller is clogged.
Thursday, March 3rd, 2011 AT 3:19 PM