1992 f250 351 motor 120k miles fuel or electric problem
A cold morning after my pick up sat for a week.
Went out and started it and it started right up just
like always. I let it warm like I always do and pulled
out of my driveway. I got to the closest traffic light
and stopped at it less than half a mile away. When
I started to go after the light changed the truck
stalled out. I thought that maybe it was just me
popping the clutch too fast but that would be rare
for me. So I tried to start it again and all it would
do is crank and crank. I even switched tanks
wonder if the one pump went bad or the gage
went bad and it still did not start. Eventually the
battery died and I had to have it toed home. Even
though it was a short ride it was still bouncy on
that flatbed. I put a battery charger on it and
started checking things. I check that both fuel
pumps were working by turning on the key and I
could hear them run for the few seconds like they
are supposed to both of them. That confirmed the
switch and both pumps were working. I checked a
standard and maxi fuel pump fuse in the fuse box
under the hood both were intact. I also checked
the fuel pump relay by swapping it out with the
horn relay and the horn blow with both relays. I
don’t think it is the throttle position sensor due to it
still having amazing power when it is running and
not lagging at all when the gas pedal is pushed.
For that same reason I really don’t think it is the
fuel filter due to still having amazing power and no
worse mileage. I don’t think it’s the battery due to
it starting right up after sitting. I don’t think it is the
alternator the gage in the cab reads 14 volts when
truck is running. This same thing happen one more
time a couple of days later. The only difference is
the second time it started and ran good before the
battery died. Also within the last year and less than
10k miles I changed the plugs, wires, and cap.
Within the last 2 years I have changed the clutch
and starter. Before that I did not own the truck.
Anyone have any ideas????