The valve on the fuel rail will have a little gas and pressure there but may not have enough for it to run on .check for voltage at the fuel pump when turning the key on ! You should hear it run as soon as you turn the key on .

 

ill check it out now

 

My lousy Haynes diagram (1986-1990) shows a yellow wire on diagnostic connector #1. The yellow wire should be +12VDC with the key in both the START and ON positions.

I also saw a diagram on the NET that showed the connector near the MAP sensor.

Anyone with a 1990 care to check it out?
My 1991 is slightly different for fuel pump ballast resistor/relay combination.

 

problem solved guys..it was a fusable wire on the ignition module..it cut fuel but after looking over everything to figure it out i reliezed how much more my truck needs but it runs again thanks 4 everyones input

 

Good to hear you got it . I'll have to remember that fuseable link .

 

Whew...

 

ya but i still have to figure out what caused it to pop

 

Where exactly is this fusable link located?

Thanks

 

the link connects the the ignition module (renix) (spelling) or somthing in that area and it was cuttting fuel ..i can take a pic if you would like

 

hey. I am having similar issue. Post a pic please.

 

whats ur truck doing?

 

I fixes my issue. But what it did, is that the pump would not prime when key in on position. The truck would crank normal fire up and then kinda slowly stall, it would restrat fine and then do the same. The fuel pressure would be fine for the first 2 seconds and the just drop of to zero. It ended up being a ballast resistor.