Truck won't start, no fuel pressure?

[lewisstraughn]

I went out to start my Ty this afternoon and it just turns over and nothing. I did the test where you connect a test light on the fuel pump test lead by the fuel pump relay on the fire wall and it lights for 2 secs when you turn the key to the on position. I put a fuel pressure gauge on the shrader valve and turn it over and no pressure. How can I tell if the pump is working without removing the tank? Where is the fuel pump fuse located? I've looked everywhere and can't find it. What else should I check?

Thanks for any tips,

 

[Thrillhouse]

Turn the ignition to ON and then run back to the rear, stick your head under the truck. You should be able to hear the pump whir for about 5 seconds then shut off. Sometimes it helps to get a friend to turn the key on for you. Also check the Fuel Pump relay on the drivers side of the hood, on my blazer its the relay closest to the door, though it may be different for you guys. A new relay is only a few bucks so you might just want to flat out replace it.

Could also be a plugged fuel filter, though I doubt it.

 

[jwaller]

you can also put power to the gray test lead under the hood by the dist...this will power up the pump.

 

[Daron]

Applying power to the gray test lead on the firewall should get you some fuel pressure if the pump is functional. If not, check the ground that goes from your pump to the frame. If you apply 12 voltls to the test lead, hear pumping but do not get the pressure, try and replace your fuel filter.
Should you get the fuel pressure but the truck still will not start, tell me what the RPM gauge does when you crank the motor over.

 

[InvisiBill]

Re: Truck won't start, no fuel pressure?

Where is the fuel pump fuse located?

The fuel pump runs through the ECM-B fuse. Often a Walbro upgrade will require you to use a bigger fuse to handle the extra current. I'd think that a blown ECM-B fuse would cause other problems too though...