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Old 03-28-2015, 02:40 PM   #1
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Won't stay running

1989 pace Arrow jd chassis
7.5 4bbl. Starts dies as soon as gas is pressed. Rebuilt holly, new fuel filter, sat for 5 years . Low fuel pressure issue? Vacuum issue? I need help, I'm not doing shotgun repair. First ford motor if ever seen. Yes I know to fix a Ford buy a Chevrolet
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Old 03-28-2015, 03:11 PM   #2
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Accelerator pump?
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Old 03-28-2015, 04:20 PM   #3
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That's my thoughts. With the engine off, look down the front primary throttle bores. Move the throttle back and forth and you should see a good squirt of fuel spraying into each bore on accel.
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Old 03-28-2015, 04:27 PM   #4
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Even with a bad accelerator pump, he should be able to nurse it up above idle. How bad does the gas smell, it could your problem.
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Old 03-28-2015, 04:46 PM   #5
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Bad circuit breaker or oil pressure switch.
Might even be a bad relay.
You need to bypass the oil pressure switch and trace the wiring out with a loading test light.

The fuel pump wiring diagram:




Oil Pressure switch Jumpered:

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Old 03-30-2015, 08:41 AM   #6
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I've flushed the fuel system, has some particulates put nothing unusual for a older rig. The holly gets tons of fuel.
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Old 03-30-2015, 08:49 AM   #7
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To top everything off. Last night someone tried to steal my generator. Sitting on the ground, guess they found out how heavy. Thanks for all the information
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Old 03-30-2015, 08:53 AM   #8
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My first thoughts are to make sure we have fresh new fuel, not 5 year old fuel?

Carb rebuild - As others said - Is the accelerator pump working? Is the bowl level set correctly?

If you do a slow steady press of the gas pedal, will it rev up?

If not, using a can of starting fluid, will it rev up if you squirt starting fluid in it as you press the gas pedal?

If it revs ok, then you have a fuel problem. If it doesn't rev, you may have other issues.

Thinking out loud - If its standard distributor, what is the vacuum advance doing. Is timing so far off that the vacuum advance is pushing timing way out? (
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Old 03-30-2015, 09:12 AM   #9
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Quote:
Originally Posted by diesel1204 View Post
I've flushed the fuel system, has some particulates put nothing unusual for a older rig. The holly gets tons of fuel.
Note that most of the fuel wiring is bypassed during the cranking of the engine so you will have fuel while cranking. Then when the engine starts it may lose the power to the fuel pump if you have a problem with the relay, switches and wiring or low oil pressure.
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Old 03-30-2015, 12:46 PM   #10
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Thanks for all the information. The accelerate r pump works great. But it would help to have the pump cam linkage. I'll call it a brain fart
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Old 03-30-2015, 12:56 PM   #11
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Did you get it working???
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Old 03-30-2015, 11:44 PM   #12
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A twenty six year old rebuilt carb would be the first thing I'd replace
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Old 03-31-2015, 06:03 PM   #13
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Yep accelerate pump cam spring was gone. Running great. Now I going to bypass smog pump.
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Old 03-31-2015, 06:13 PM   #14
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EXCELLENT

Its nice when it turns out simple and no cost..
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