Ok, first post in this forum. I have had quite a few Dodge trucks in the past but this one has me stumped.

I picked up a 1988 Doge W250 with the factory Sno-Commander package. The fuel lines were leaking so I replaced the bad section with rubber high pressure fuel line. I couldn't build any fuel pressure at the carb after replacing the lines so I went ahead and replaced the fuel pump. Still no pressure. I jumpered the pump to make sure it was ok and it runs when jumpered. Is there a relay for the fuel pump I am not seeing?

 

there should be a relay under the hood on the drivers side fender

 

I found two relays, one was in a metal case fastened to the fender and the other was a plastic cube type relay. Neither one looked like the one I got at the Auto parts store...

 

there are many different types of relays. the plastic cube relay should be your fuel pump relay and the metal one fasten to your fender is most likely your starter relay.

 

A quick check to see if it is the start relay is if you remove it, the engine will not turn over. There should be 2-4 relays on that fender depending on how the truck is equipped. I have 3 and they are all metal.

 

I'm pretty sure the metal one is the starter relay also. The relay I got at the auto parts store has a different blade configuration on the bottom of the relay...of course I'm sure they wouldn't give me the wrong relay would they??? That would never happen!

I'm going to try and jumper that relay at the plug and see if the fuel pump runs.

 

In 88 with only 2 relays, one is the starter relay and the other is the ASD relay. The ASD relay controls power to the fuel pump, not the starter relay.

 

OK, I got the correct relay and found the problem with the original relay, one of the blades from the relay had broken off and stuck in the plug, my 52 year old eyeballs didn't see it right away. Now I can hear the fuel pump run for a second when I turn the key on but I'm still not building any fuel pressure. I took the 5/16 line off at the carb and I'm not getting any fuel....any ideas?

 

Are we dealing with a carb or a throttle body because if it is a carb there has to be a fuel regulator some where in the fuel line? Is there fuel in the tank? When was the fuel filter last changed? Where is the section located that you repaired with the rubber hose? You may have collapsed the metal fuel line when you tightened the hose clamp. I would pull the line off the fuel filter inlet and activate the pump. If there is no fuel from the line you will have to drop the tank.

 

Throttle body. I have fuel in the tank...I jumpered to make the pump run with the fuel line disconnected at the tank and had fuel pumping out about two feet from the pump where I had the line and replaced with high pressure rubber fuel line. The Fuel filter is new.