carb problems

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Jan 25, 2004 | 06:05 PM

tye sheats

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From: wa

carb problems

I own a 1977 f-100 with a 351m and has a 4 barrel edlebrock carb, 600 cfm i believe. Now i was wondering what the right adjustment for the carb would be, and which screws are what. The problem is when i start driving the truck for like about 5 miles or so it starts to cut out and boggs slowly down, like it starving for gas or something, i have replaced the fuel pump, sending unit, and put an edlebrock in filter, plus the lines are clear? do i need to have it rebuilt??would you help me out!

Jan 25, 2004 | 08:33 PM

lee

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From: Lacey, WA

Hi,

Is this something that just started?

After the truck cools off is it OK then?

It sounds like it could be a heat problem percolating your fuel.

We need alittle more history on your problem. Is the carb newly installed?

Good luck,

Jan 25, 2004 | 08:44 PM

tye sheats

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From: wa

im not sure if the carb is newly installed or not, because i didnt install it myself, but looks kinda new, (more than a year probley)
and i know it not a heat problem percolating my fuel. thanks

Jan 25, 2004 | 10:19 PM

LxMan1

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From: Louisville,Ky.

It sounds like the carb is icing up. Does it smell like it is running rich? any black smoke?
Trucks are bad about this in the winter when the stock air cleaner isn't used. They need the warm air from the exhaust manifold to the snorkle to keep the incoming air warm enough to keep the air bleeds in the carb from icing up and making the carb flood.
Jimmy

Jan 26, 2004 | 07:11 PM

tye sheats

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From: wa

nope,no black smoke!!

Feb 6, 2004 | 07:17 PM

brian2372

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From: nevada

id also check your coil if it has one .if the bottem is puffed out you need a new one .i fixed a guys car years ago that did the same thing and he thought it was the carb.

Feb 7, 2004 | 12:51 AM

LxMan1

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From: Louisville,Ky.

carbs icing up

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Feb 8, 2004 | 11:42 AM

LxMan1

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From: Louisville,Ky.

A new one will do the same until you install the stock air cleaner until warmer weather hits.

Feb 8, 2004 | 05:54 PM

#10

tye sheats

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From: wa

im pretty sure its not icying up, the float was sticking and had a lot orf dirt too.

Feb 9, 2004 | 08:54 PM

#11

gunrackgirl

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Joined: Sep 2003

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From: Manitou Springs, CO

Do you know if you have the heat stove or choke tube (they funnel warm air up to the carb)?

Feb 9, 2004 | 09:12 PM

#12

tye sheats

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From: wa

i have no idea??

Feb 9, 2004 | 09:33 PM

#13

gunrackgirl

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From: Manitou Springs, CO

The heat stove would be a big metal tube about the size around of your arm going from the underside of your air cleaner down to the block, where it bolts on. Usually passenger side. The choke tube is a think tube going from the back of the carb down to the manifold, where it screws in. Should have a thick fabric sheath over it to protect anything around it from getting to hot. These help warm air going into the carb.

Feb 9, 2004 | 10:48 PM

#14

LxMan1

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From: Louisville,Ky.

I see Tye. Dirt will make a carb act up pretty bad. I would try rebuilding it first. There are only a few pieces to change ( accel pump, needle and seats and top gasket). It would be alot cheaper.
Just a suggestion,
Jimmy