shutting down
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shutting down
I have a '76 fordp/u,4x4, 390 4bbl(600edelbrock). Msd ign(dist,coil, 6abox).I re-placed the modual,several times, also the coil, and the msd box.It( has new 8ml wires, new plugs,)It also has a new mech fuel pump. After it has ideled for 15 0r so min, it will shut down, But it will start.I have a heat spacer between man & carb.It won't run continualy.Whats wrong?? I need a electrick fuel pump?
Posting Guru
Joined: Jul 1999
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From: Inthepast
shutting down
[FONT COLOR="#0000ff" SIZE="3" FACE="Veranda"]
Intermittent problems are hard to diagnose; try to rule one thing out at a time, don't jump around. How long has this condition existed and were there any significant events that seem to coincide with it? If the truck consistently restarts immediately it doesn't sound like ignition, but rather fuel deprivation. However, don't jump to the conclusion that the fuel pump is bad. You can test them with a pressure gauge. The pump should be putting out 4-6 psi. Pumps do go bad, but again, if the truck is restarting, I'd say the pump is probably o.k. What comes to mind is perhaps plugged filters or a dirty carb. You probably have an inline filter at the carb. Have you changed it lately? Does your truck have one of the canister type filters on the fuel pump? If so, change that. You may have to take the carb apart to clean it. I am sure some others will have some excellent advice. Keep us posted, please.[/FONT]
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Intermittent problems are hard to diagnose; try to rule one thing out at a time, don't jump around. How long has this condition existed and were there any significant events that seem to coincide with it? If the truck consistently restarts immediately it doesn't sound like ignition, but rather fuel deprivation. However, don't jump to the conclusion that the fuel pump is bad. You can test them with a pressure gauge. The pump should be putting out 4-6 psi. Pumps do go bad, but again, if the truck is restarting, I'd say the pump is probably o.k. What comes to mind is perhaps plugged filters or a dirty carb. You probably have an inline filter at the carb. Have you changed it lately? Does your truck have one of the canister type filters on the fuel pump? If so, change that. You may have to take the carb apart to clean it. I am sure some others will have some excellent advice. Keep us posted, please.[/FONT]
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Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
shutting down
Dittos Stockman. The refiring part makes it sound like fuel line trash somewhere to me.
John
jowilker
Club FTE since 01 01
NC Chapter
66 F100s
In the still cool hours of the night,
you can hear chevys rusting away.
John
jowilker
Club FTE since 01 01
NC Chapter
66 F100s
In the still cool hours of the night,
you can hear chevys rusting away.
Postmaster
Joined: Feb 2000
Posts: 2,759
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From: Auburn,Al
shutting down
in the time its running, does it run good? or is there hesitation or anything?
1985 F-150/351Ho/4wd/6inch with 33's
1979 f-250 429/4spd/
on a quiet night your can hear a chevy (lol,you can watch a dodge) rusting away
1985 F-150/351Ho/4wd/6inch with 33's
1979 f-250 429/4spd/
on a quiet night your can hear a chevy (lol,you can watch a dodge) rusting away
Junior User
Joined: Sep 2000
Posts: 99
Likes: 1
shutting down
Does it have dual fuel tanks? If so,it might be the fuel line that comes off the tank switch. These kink and colapse over time and are "beyond frustrating" to diagnose if it's never happend to you before. It'll run perfect for a while, surge, sputter, die completly, run good again, etc.
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shutting down
When my engine is running, it runs smooth,and then it just shut's off!! Would you suggest a electic fule pump?
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Junior User
Joined: Dec 2000
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From: Garden City Kansas
shutting down
By the way it sound s to me it sounds like you have trash in your tank. it will start run fine and then trash will be sucked onto your fuel line stopping fuel flow to your carb. Try cleaning out your tank and see if thatt helps.
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