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I've been working with a friend for the past few months on switching the engine out of one '91 F150 into another.

Yesterday we finally got everything alligned, replaced the spark plugs, replaced the starter, put in a new thermostat, hooked up the celenoid, etc. and put in a new battery. Then we put gas in and tried to start her up.

We know we're getting power and spark but don't think any gas is going from the tanks to the engine. We read the manual and found the Fuel Line reset button in the cab by the clutch. Reset it. Tried again but nothing happened. The engine seems like it's trying to turn over but we don't smell gas.

What could be going wrong?

The only thing we can imagine is that maybe the fuel lines we attached have heat sealed too tightly over the valves or we've clamped them too tightly and so no gas is getting into the engine? They're on so tight that we can't pull them off by hand and would have to cut them.

2007-10-04 18:00:21 · 7 answers · asked by clearly here 1 in Cars & Transportation Maintenance & Repairs

7 answers

I would check for continuity at the fuel tank cross over switch, These and the inertia switch - they're known to just crap out like that, and it would affect both tanks. It's inside the R kick panel under the dash

http://www.supermotors.net/vehicles/registry/media/71811_1

There is a pump in each tank. If it won't start after trying each tank {pump} then I would say your problem lies elsewhere, the chances of both pumps going bad at the same time are slim

other possibilities include, fuel pump relay, fuel pump relay wires, Injector pump, fuel pressure regulator

2007-10-04 18:54:29 · answer #1 · answered by Skull 5 · 0 0

Have you checked to see if the fuel pump is working? That is the only thing you haven't mentioned that I could think of.

2007-10-05 01:06:01 · answer #2 · answered by Bryan 2 · 0 1

Do ya have dual tanks??? Are the fuel filters clean? Are the fuel pumps working!! Check-check-check

2007-10-05 01:08:06 · answer #3 · answered by happywjc 7 · 0 1

try putting a little bit of gas in the carb and try to start.if it dosent start.take the gas line to the tank and blow air through it and gas should come out and reattach to fuel pump . add gas to carb to prim pump. if it dosent start replace pump

2007-10-05 01:18:28 · answer #4 · answered by cmebigone 1 · 0 1

if you turn the key to the on position...can you hear the fuel pump running? should kick on and run for 20 seconds or so...if it doens't kick on start simple and check fuse and work from there

2007-10-05 01:05:58 · answer #5 · answered by Hillbilly 3 · 1 0

check the fuel pump and the fuel filter...

2007-10-05 01:04:20 · answer #6 · answered by Me 4 · 0 1

fuel filter is plugged (on the frame)

2007-10-05 01:06:48 · answer #7 · answered by jrever 1 · 0 1

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