carb when cold,,,,
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carb when cold,,,,
[updated:LAST EDITED ON 10-Dec-02 AT 09:51 PM (EST)]ok..if my 79 straight 6 300 isnt warm and i dont ease on the gas its like the carb bogs down and like floods itself...its died before when doing this and it has backfired through the carb before too...what gives?
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Joined: Jul 1999
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From: USA
carb when cold,,,,
[updated:LAST EDITED ON 10-Dec-02 AT 10:19 PM (EST)]Sounds like either a choke or an accelerator pump problem.
With the engine off, you should see a "squirt" of fuel injected into the carb venturi as soon as the throttle plate is opened.
Additionally, the choke plate should be spring-loaded shut with the engine cold, and open up when the engine warms up.
If this does not make sense to you, have someone who knows carbs check it out.
Art
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=3467&.jpg
With the engine off, you should see a "squirt" of fuel injected into the carb venturi as soon as the throttle plate is opened.
Additionally, the choke plate should be spring-loaded shut with the engine cold, and open up when the engine warms up.
If this does not make sense to you, have someone who knows carbs check it out.
Art
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=3467&.jpg
Posting Guru
Joined: Jan 2001
Posts: 2,358
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From: Nebraska
carb when cold,,,,
I'm not trying to steal ladykiller85's post, but we've got a 79 F-150 351m that has the same problem. Bogs down real bad until fully warmed up. I don't know much about carbs, but wouldn't an accelerator pump problem do it regardless of temperature? If it is a choke problem, I don't really understand how the problem actually occurs. I do know the choke closes like it should when it's cold and the truck starts easily but doesn't always want to idle at first.
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Joined: Sep 2001
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carb when cold,,,,
>I'm not trying to steal ladykiller85's post, but we've got a
>79 F-150 351m that has the same problem. Bogs down real bad
>until fully warmed up. I don't know much about carbs, but
>wouldn't an accelerator pump problem do it regardless of
>temperature?
Mostly, but accelerator pump problems are made worse by the cold.
>If it is a choke problem, I don't really
>understand how the problem actually occurs.
If the choke is not sufficient or pulls off too quick you can get bogging.
>I do know the
>choke closes like it should when it's cold and the truck
>starts easily but doesn't always want to idle at first.
Still an adjustment problem.
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>79 F-150 351m that has the same problem. Bogs down real bad
>until fully warmed up. I don't know much about carbs, but
>wouldn't an accelerator pump problem do it regardless of
>temperature?
Mostly, but accelerator pump problems are made worse by the cold.
>If it is a choke problem, I don't really
>understand how the problem actually occurs.
If the choke is not sufficient or pulls off too quick you can get bogging.
>I do know the
>choke closes like it should when it's cold and the truck
>starts easily but doesn't always want to idle at first.
Still an adjustment problem.
Thanks for using FTE!
[font color=red]As a Moderator I do not "Subscribe" to most topics,
please send email/pm if you need a reply -Thanks![/font]
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