Fuel pump bench test
Thread Starter
|
New User
Joined: May 2010
Posts: 8
Likes: 0
FIXED! The pump was indeed bad. I was shocked that the pump did go out at 100,000, but not surprised. My expedition has 160k and others that I know of with well over 200k on their trucks with the factory pump. Anyways I checked current all the way to the pump and all was good so I knew I'd be dropping the tank and removing the pump. By the way, on my particular model, the harness/connector plug is 7 wire. (2 to the pump, 2 to the sending unit and 3 to a polution controlled device on the tank). The 2 heviest gauge wires in the loom were to the pump, a black ground and a red with a tracer positive. I had 12 volt to that point briefly when you turn the key on which is when you would initially hear the pump cycle to prime. I pulled the chassis that houses the pump and sending unit from the tank, then pulled the pump from the chassis. The pump has a 2 pin connector, positive and negative obviously. When I put 12 volts straight to the pump, the current draw was extremely high and the motor just hummed, it was frozen. I bought a new Airtex pump with a 1 year warranty and replaced the 2 tank strainer/filters then put it all back together in the tank. While the tank was out, I went ahead and put 12 volts to the connector to make sure it worked. The fuel just kind of trickled out with low volume and I immediately thought, this isn't going to work. I put my finger tightly over the outlet port and cycled the pump, it blew my finger off like a bullet would from the end of a gun without the mess. I put the tank back under the truck and hooked up the lines while it was still on the ground and started the truck before I went ahead and fully installed the tank. She fired right up. All in all, it cost about $175 in parts and about half a day in labor.
Thread
Thread Starter
Forum
Replies
Last Post
Steve in NC
1968-Present E-Series Van/Cutaway/Chassis
10
Dec 23, 2015 03:43 PM
