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post #1 of (permalink) Old 01-17-2007, 09:24 PM Thread Starter
Journeyman
 
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O/T. Ford fuel pump

I just came across a 88 F250. Its ben taken off the road since 2000. Only ran on a farm to haul wood.I put brake lines on it seems to run ok when it starts. It starts hard sometimes needs a shot of starting fluid then kicks right off.The electric fuel pump runs and doesn't shut off when you turn the key to the on position.I'm not a real ford guru. Any help would be apprecciated.Thanks guys Jim
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post #2 of (permalink) Old 01-18-2007, 10:04 AM
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Re: O/T. Ford fuel pump

Is that a CenteralPointInjection system, with two injectors, similar to the GM TBI? The fuel pump runs all the time, at a fairly low (about 12psi) pressure.

So, do you always have good spark?

Does it start right up with starting fluid?

If it does, I'd monitor the fuel pump pressure, and look to see if the injectors are opening, and spraying fuel into the Throttle Body throat. I slip a little piece of cardboard into the TB and watch to see the spray pattern on the cardboard. If there's no spray on start, the fuel injectors are clogged/clogging, or the TBI regulator is shot, or there's no pressure at the TB during crank till the fuel pump pressurizes the fuel line.
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post #3 of (permalink) Old 01-19-2007, 04:52 AM Thread Starter
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Re: O/T. Ford fuel pump

Leve , The spark is good .It fires right up with starting fluid & run fine. The fuel pump is supposed to build pressure then shut off. A friend of mine had 2 trucks like this one. I'm in the procces of changing the filter, checking pump pressure & the pump relays Thanks jim
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