help with 390 stalling after started

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Oct 17, 2005 | 08:18 PM

7sixf150

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help with 390 stalling after started

how do i fix this? it starts good. but then after a few minutes it will stall. do i need new choke lines? or is there more to it?

Oct 17, 2005 | 08:52 PM

fordeverpower

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From: iowa

my guess is that the choke plate on the carb is staying closed as the motor warms up. I don't know it could be a fuel problem, since it restarts, right?

Oct 17, 2005 | 08:55 PM

7sixf150

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i also don't have the choke lines hooked up. both of them broke off. does anyone know how to put new ones on?

Oct 17, 2005 | 09:04 PM

fordeverpower

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From: iowa

wait a minute, where do these choke lines come from, the manifold or exhaust manifolds? I smell an imposter! lol

Oct 17, 2005 | 09:05 PM

7sixf150

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exhaust manifold i'm pretty sure.

Oct 17, 2005 | 09:23 PM

fordeverpower

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From: iowa

try a an elcetric choke setup, I never heard of FE's having an automatic type choke.

So does the choke plate move at all?, the throttle plate or whatever you refer to it as.

Oct 17, 2005 | 09:25 PM

7sixf150

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i'm not sure if it moves. i will check in the light tomorrow though. how do i set up an electric setup?

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Oct 17, 2005 | 09:40 PM

76supercab2

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Few things to check.
1. Fast idle speed. Should be 950-1000 RPM
2. Choke pull off. There's a vacuum dashpot that should pull the choke plate slightly open after it starts. Check by taking the air cleaner lit off, set the choke and start the truck. As soon as the engine starts, you should see the choke plate move maybe 1/8 inch.
3. Choke plate adjustment. There should be just enough spring pressure to close the choke plate.

Oct 17, 2005 | 09:44 PM

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7sixf150

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ok thanks. i also have a 4 bbl holley carb if that changes anything?

Oct 19, 2005 | 05:39 PM

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1975Ford

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Quote:

Originally Posted by 7sixf150

ok thanks. i also have a 4 bbl holley carb if that changes anything?

Choke operation is basically the same, with manual and electrical choke, on a four barrels or two barrel or one barrels.

Convert the choke to and electrical housing choke and run the positive wire from the alternator terminal. Not quite sure if it was the stator side on the alternator. But it should pull 7.5 volts if it is the right terminal on the alternator.