So tonight before I was about to leave from work I started my truck to warm it up. When I was doing a little last remaining work I heard it sputter out. I went out to restart it and when I did it fired up on 1 cylinder and then would turn off almost immediately. After about 30 minutes I finally got it to fire up again so I hopped in it to go home. I made it about 4 miles and it sputtered out again and wouldn't restart. I got out and monkeyed around under the hood, checked connections, checked to see if the coil wire might have popped off. Then all of a sudden I got it to fire back up. At that point I thought my fuel pump for my rear tank was taking a **** so I headed to the gas station. Made it to the driveway of the station and it sputtered out and wouldn't restart at all.

What could cause this? Truck just cranks and cranks. After it would sputter out all I could smell was unburnt fuel. Cycled the key and couldn't hear the fuel pump kick on for either tank. All fuses were good, inertia switch was hooked up and not tripped, tank switch worked properly this morning, all gauges worked properly. Ran perfect this morning.

1991 F150 2wd 300i6 EOD4 trans. Snowed about 3 inches but had the problem before I even moved the truck.

Thanks in advance

 

Check fuel pressure, codes, and see if you are getting spark.


I personally think it is your fuel pump or TFI. If you say you smell unburnt fuel it is probably spark.
Trav

 

See if it runs on ether, that'll tell you where to start looking.