Question about Ford F-100

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1981 ford f-100, 6 cylinder, 300 cubic inches, single barrel carburetor, I was hoping to find an aftermarket carburetor that would get better gas mileage

Gets 11 mpg with the original carb. Was looking to get more.

Posted by Anonymous on


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  • 2 Answers

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Posted on Jan 02, 2017

  • 80637 Answers


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

  • 181 Answers

SOURCE: I need a diagram for a 1980 ford 300 climatic


Posted on Feb 13, 2010

  • 2002 Answers

SOURCE: I purchased a F250 that has a 460 engine/ 4 barrel

Tune ups on a regular basis are a must. A couple times a year check the plugs and replace if they are a little bit dirty. Also air filter. Keep the carb in tip top shape, tuned and rebuilt as necessary. Install an aftermarket vacuum guage in the dash where it is easily readable. They come marked with ranges to indicate good or poor mileage. It just plugs into the vacuum lines on the intake or carb. The more you keep it in the good range the better the mileage. Driving habits will be your best bet,keeping off the 4 barrel. Hope this helps.

Posted on May 02, 2010

  • 1970 Answers

SOURCE: looking for a diagram of a single barrel holley carburetor

mcdevito75 here, A repair manual at your local library could have the diagram.

Posted on Jun 17, 2010

  • 1165 Answers

SOURCE: 1987 Isuzu pick up 2.3 . Carburetor runs much to

It's either a stuck float or the choke is staying closed. If you're smelling gas, then it's probably the float. You need to rebuild the carb.

Posted on Dec 22, 2010

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I have a 69 Ford F100, 1 barrel carburater, the choke needs to be wide open for it to run. When I switch gears, I need to close choke and open it back up when I shift-this is the only way it will run. If I...

You need to rebuild the carburetor. As it is a 1 barrel its relatively easy to rebuild if you can find a kit, but it is the original carb and difficult to find parts. You may also consider buying a Holley 2 barrel carb - it will bolt right on and give you more power, and they are much more common and easier to find rebuild kits and parts. It's possible you may need an adapter plate, depending on the configuration of your intake manifold, but that will be easy to find. You can either shop online or buy from your local auto parts store or high performance shop. That old 1 barrel has had its day and I'm sure it served you well,but I think I would upgrade to a newer carb myself.You may be able to clean it out using carb cleaner spray but it would be hard to clear out that clogged jet that is causing your trouble, and then you will likely tear the gasket when you take the top off that carb.

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The F100 ended in 1983, so there is some confusion on your 1987 Ford F100. The F150 started in 1983 and was available in 1987, but not the F100. You have this listed under the 1981 Ford F100 category.
The 300 CID = 4.9L In-Line (Straight) 6-Cylinder.
In order to best answer your question I have included both the 1981 F100 4.9L and 1987 F150 4.9L below. The only difference is with the Distributor Cap Configuration and Connections.

For the 1981 F100 300cid=4.9L:
Firing order:

For the 1987 F150 300cid=4.9L:
Firing Order:

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at!

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