Question about 1981 Ford F 150

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Carb How do I set the choke on the carb of a 300 straight 6 , single barrel carb ? I can smell gas when I first start the truck ! Todd

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Its better to have it rebuilt......... it might be a float issue do u have black smoke when it first starts????

Posted on Oct 19, 2008

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When you set the choke there are many adjustments, most require linkage rod binding and a choke angle guage, also there is a cold high idle setting when the choke is on, all of these adjustments are different for each carburetor number, the carb number is stamped on the carb, there are 20 or so numbers of carbs for your truck they are called calibrations, My suggestion to you is to get the number off your carb and buy a rebuild kit made by Jiffy, they are the best and provide detailed instructions for each carb number covered by the kit.

Posted on Oct 19, 2008


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2 Answers

Ranger carburetor

Runs that rough after sitting 5 years? Don't even second guess it: get a rebuild kit to replace all gaskets and rubber parts. 2 or 3 cans of carb cleaner to really clean it well and all passages in the casting. Don't bother with the carburetor dip-it's been so sanitized and leaned out with all the regulations, doesn't do as good a job as it used to. Aerosol cans of carb cleaner with the tiny tubes for cleaning out those little passages.
Start off with a known good carburetor. Use fresh gas, too.

Jan 03, 2014 | Ford Ranger Cars & Trucks

1 Answer


How many rpm's is it running at when you first start it up and it is running on the choke? Does it gradually start to idle back and then start to die r does it do it all of a sudden and dies?

When running with the choke on, it is on the high idle circuit of the carb, as it warms up the idle should slow down and then idle in the 800 rpm range in Park, 650 in Drive. This will be the low idle circuit range. This transition inside the carb will cover an idle air bleed hole in the venturi of the carb and lean out the mixture. If you notice that the carb smells gassy and black rich unburnt gases are coming from the tailpipe, the problem is located within the carb and requires a carb tech to do a rebuild of the carb. You could try a good carb cleaner like Lucas by putting it into the gas tank, in case you just got a bad tank of gas, but that is just a bandaid for a more deeply rooted problem. Get the carb rebuilt?

Nov 27, 2013 | Cars & Trucks

1 Answer

84 f150 carburetor out of tune

When you get a rebuilt carb you have no idea what the
applications are for

I suggest you rebuild your own,
that way you have all the settings
& experience when your done

I think the float needs to be set correctly
& maybe the pump if there is anything for that

You have to have some knowledge about basic
adjustments of air idle screws

Start about one turn out from seated & then use a
vacuum gauge to get the highest reading & then go in
a 1/4 turn
Can use a tach also or both,then reset the timing

I would have all 3 on motor at once

When done you set the idle screw with air cleaner on

Nov 25, 2012 | 1984 Ford F 150

1 Answer

Truck is flooding on start and idols extremely rough. It has a single barrel carb and the fuel smell is strong at idol. This carb was over adjusted prior to replacing the head. How do I get the adjustments...

Your adjustment is really , really out or your choke is stuck or hooked up wrong. I personally dont suggest that you do the adjusting yourself if your not familiar with carbs due to the fact that it is what feeds your engine the explosive juice it needs to run AND you dont want to have a fire in your engine compartment. But I do suggest that you take it to a person qualified and have it checked out before it dedoes start a fire or other internal damage to your engine. But if you are familiar, reply and I'll walk you thru it.

May 09, 2010 | Cars & Trucks

2 Answers

Truck is flooding on start and idols extremely rough. It has a single barrel carb and the fuel smell is strong at idol. This carb was OVER adjusted prior to replacing the head. How do I get the adjustments...

I suggest carrying around a small screwdriver for this reason... at all times. My 67 stang had this problem in the Straight 6. There are going to be two adjusters, I honestly say just mess with it until you get an adequate response from the motor that you like. (This is for rough, quick, on the fly moments, like being late for work.) Both will need to be messed with in order for you to get the best burn you can.

Mar 17, 2010 | 1985 Ford F150

1 Answer

I have recently rebuilt the single barrel carb on my 84 ford f-150, 4.9 liter in line 6 cyl. i followed the rebuild instructions however then cvarb wants to flood and will only start with it choked. what...

Check the two screws / pins on the side connected to the air / gas flow levers. The screws go into and out of the carb and / or rods itself. Just play with it and hope you didn't leave anything out!

Mar 17, 2010 | 1984 Ford F 150

2 Answers

Car cuts out on acceleration

it sounds like the points are not opening enough. or to much timing. thats to far advanced timing. but points most likely good luck.

Nov 23, 2008 | 1966 Ford Mustang

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