 Will not start.
1987 F250 460 w/carb, 4WD, dual tanks, automatic
I get no fuel to the carb. I replaced both in-tank pumps and the fuel selector valve. There is not any voltage to the pumps unless the motor is cranking. (Nothing happens when the key is in the 'run' position.) The switch on the dash is fairly new and I checked it with an ohmmeter. There is not voltage on this switch unless the motor is cranking. The truck will not start. I recently removed the Holley/Motorcraft and put an Edelbrock on it, but that really has nothing to do with it. The Haynes manual I got is completely useless.
The voltage to the pump is 10.6 VDC, I think it is only supposed to be 11, so this should still operate.
Oil pressure/sender is fine. How do I measure voltage if a fuse is blown?
I did not wire it wrong. I just pulled the connectors and put them back on. I did replace filters. The truck gets spark, just no fuel. I can backfill the line and vacuum keeps it going. Major pain doing it this way.
It is original with a carb. No high pressure pump on fuel line. I dunno why they did it, but they did. Even the vacuum/wiring sticker on the inside of the hood shows a carb.
The pump does work while the key is in start (noted that in original post) but does not work at any other time. Lines are not blocked.
There is not even a hint of a spot for a fuel pump on the block. I did a 100% rebuild 2 years ago, I would have seen it then. But it is a carb and electric pumps
Last edited by tonyhartwig; 10-09-2008 at 06:23 PM.
Reason: more info
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