I have this pickup that has a "new" engine it that ran fine in another f150
.. Well, here is the history . The pickup had a blown engine in it (Fuel
injected 302) and sat for around 2 years . I found a good running 302 that
was running fine in the pickup (another 1986) . I got the engines swapped
and it ran fine for the first 150 miles or so .
Well, this is the story now, you can start the thing and run around 2-3
miles and it runs fine. Then it will start to bog down and loose power until
it wants to die . I think it is a fuel problem but am not for sure. It will
eventually die and not want to start .
I have been told that it has a fuel pump in each tank and then a high
pressure one along the frame beside the fuel filter (which I have already
changed).
I have put a can of heet in each tank thinking maybe it has water in the
fuel from sitting but it didn't seem to help .

Any previous experience would greatly be appreciated and/or suggestions and
comments.
Thanks,
Raz

The Webbers Hilltop Cycle ATV wrote:
The first step would be to check the fuel pressure. You should have about 35-40 PSI
with the engine running. The spec varies a few pounds either way by vehicle but
anything in that neighborhood is ok. If you see lower than 30, it's a red flag. If it
looks ok, attach a fuel pressure gauge, tape the gauge to the windshield and drive it
until the problem occurs. If it is fuel related, the pressure will drop off
dramatically. (pump, filter, lines, power feed to the pump, etc) If it quits and the
fuel pressure is ok, then there is another issue.
Have you changed the fuel filter? Possibly a silly question, but it's easy to
overlook the obvious sometimes. Not that I've ever overlooked anything dumb and
obvious...<cough> shop rag in the air cleaner <cough, cough>)

+it could also be a bad cat, bad coil, bad cap in the ecm, ect ect ect
"The Webbers Hilltop Cycle ATV" <dswebber (AT) netins (DOT) net> wrote