Autolite 1100 Carburetor

Autolite 1100 carburetor parts.All technical information including videos assume parts used are our brand. Parts from other sources may not install, or function the same way.
About the Autolite 1100 Carburetor

  • The Autolite 1100 one-barrel carburetor was included on 170″ & 200″, 1963-69.
  • 1963-1967 (some) came with a spark control valve.
  • 1968 – The venturi size was changed to 1.10 and there was no control valve.
    The distributor was changed to use a mechanical advance
    instead of using the venturi vacuum previously.
  • 1967-1969
    – Two diaphragms were used. The added
    diaphragm is used as an anti stall dashpot. Only one diaphragm was used prior to 1967
  • Correct venturi size for Mustangs was 1.10″, or 1.20″
  • When no tag is present, Identification can be done by inspecting the base. You can sometimes find a Ford part number there.

Buy your Autolite 1100 carburetor kit here.

Free Autolite 1100 manuals

1968-69 Autolite 1100

Power Valve

At higher speeds, the engine vacuum drops which causes the power valve to open and allow more fuel to flow.
Autolite 1100 Choke

Do not remove the power valve assembly when rebuilding, but it does need to be free to easily move up and down. For sticky power valves spray liberally with silicon spray lubricant and work it up and down until it is free. Worst case is you will have to remove the clean out plug on the top of the carburetor so that you can get at the cylinder for cleaning. You will need a new clean out plug, or patch up the old plug with JB weld (don’t get any inside). A surge at high speeds (steady throttle) might indicate a power valve
problem. Change the power valve timing to open sooner (at less throttle opening) by adding additional calibrating shims, on power valve rod (see illustration above). If less than 4 shims found on rod, add 4 shims; if more than 4 shims found on rod, add fewer number. Total number of shims on rod must not exceed 8. These shims are not produced and you only want to take the power valve apart as a last resort.

Autolite 1100 Main Jet

This is where the Autolite 1100 main jet resides. Due to the difference in gasoline, the jet size that was originally installed on the 1100 isn’t that relevant anymore. Be sure you are using the correct jet size, otherwise you chance ruining your engine. Test your main jet
by running your vehicle for 20 minutes at a sustained speed. Pull a spark plug and look at the color. Gray is perfect. White means you are too lean and need to move up one size.
Black is too much fuel and you need to move down one size. Do this one size at a time until you get a good gray colored plug. This test is only valid when your engine and electrical system are good condition.
Autolite 1100 Jet

1966 Rough Idle & Poor Fuel Economy Correction.

This condition may be caused by the fuel bowl vent valve being out of adjustment. Check and adjust the vent valve each time the carburetor idle speed adjustment is made. 

Buy your Autolite 1100 Main Jets.

Did you lose your check weight?

Autolite 1100

These are no longer available, but you can make your own. Use a 3/16″ aluminum rod, cut 9/16″ long. File the end a bit as pictured. Weight will end up being about 1 gram.

Watcha video about On The Bench Adjustments

Watch a video about rebuilding the Autolite 1100 carburetor. Part 1 – Teardown

I seem to have a problem with my carb that I rebuilt recently. It is a C8PF-D on my 1963,170 cu in Falcon with auto trans. Its a manual choke and has the spark control system and a diaphram on each side. We adjusted the mixture screw till it ran nice and took it for a small drive. Upon returning it would not idle hardly and was running very rough. We adjusted the mixture screw again and it started runnning properly agian. The next drive we took it ran great, but when we arrived home the same rough running and no idle was present agian. It acually died on us instead of idling. My question is if the mixture
screw is backing itself off due to vibrations etc.? Could the screw or spring be worn out or could it be the carb hole and threads worn out? I hope you have run across this before and can point me in the right direction. I thought about loctite to hold it, or maybe a new
spring and screw.

1st off don’t use anything on the threads. That would probably ruin the carburetor. It does seem the screws are moving from vibration. I would replace the idle mixture screw and spring.

Watch a video about the Autolite 1100 Flooding Troubleshooting


I am having an issue with my autolite 1100 stumbling when under way. Everything is fine at rest. I notice if I sit on the fender and rock the car the engine begins to stumble. When I set the float level I used the Fuel system service instruction worksheet provided in your rebuild kit and it stated to set the float level to 1 – 3/32 for my 65 Mustang 200 A/T, which I did. Do you think its possible I would need to set the float level higher or do I possibly have something else going on? Fuel pump filter and strainer are all 2 months old. As is the carb rebuild.

The 1st thing that comes to mind is that the flow bowl is warped. Check my video about fixing the 1904 with heat. Same idea.

Recent Posts

Route 66

Like an elegant actress in her senior years, Route 66 is an institution, a collection of fond memories, and a valued piece of Americana. While the highway number has been decommissioned and alternate route choices are abundant, much of the earlier roadway remains in use. The road spanned eight sates, which may not sound like a lot if you are thinking about states along the East Coast. But it becomes a lot more impressive when that 8-state drive is a whopping 2,450 miles. Today’s I-95 traversing the entire length of the Eastern Seaboard stretches only a bit more than 1,900 miles, running through 15 states and Washington, D.C.

Route 66 is an almost archetypal institution in American history due to its function as the original paved road from the Great Lakes region to the West Coast. Timing was also a major factor in the fame and function of Route 66, as it came into existence in time to meet the challenge of the Great Depression, with many travelers seeking better opportunity “out west.” But this road has an even earlier history, before it became known as Route 66, the “Mother Road,” or “Main Street of America.” Earlier, much of it had been known as the Old Trails Road, and some of it even followed pre-existing Indian trails. But none of its earliest history foreshadowed the greatness that was to become known as Route 66.

U.S. Route 66 was officially established in 1926, but the entire length stretching from Chicago to Los Angeles was not fully paved until the late 1930s. That was just before American novelist John Steinbeck popularized it in The Grapes of Wrath, as “The Mother Road” in 1939. Even the paving of this iconic road was a story in itself. The Depression created a massive unemployed work force, which completed the construction in a major government initiative creating needed jobs.

Popular Culture

After both the novel and the film titled The Grapes of Wrath created the public awareness of Route 66 as The Mother Road, the highway was further popularized by the highly successful pop song, “Get Your Kicks on Route 66″ in 1946, and the iconic “Route 66″ TV series debuting in 1960. The series highlighted seemingly continuous travel on the highway by two young men in a Chevrolet Corvette. The popularity of the TV series may also have been in part responsible for the many re-recordings of the original Nat King Cole song. In any case, the highway has become almost synonymous with leisurely episodic travel in the United States despite the growth of the Interstate Highway system, which was supposed to revolutionize road travel, replacing the need for such “outdated” routes.

The most recent popular surge in the mystique of Route 66 came from the Pixar Animation film, Cars, which details the adventure of several characters in the context of a fictional town, victimized by the construction of the Interstate highway system’s redirection of traffic away from small towns along what is conceived to be Route 66. The movie, Cars, debuted in 2006, and has been followed by two more feature length films, two TV series, and a short film, as well as nine video games, extending the Pixar franchise into 2016 (3rd film’s release). A major factor in the popularity of Cars is its use of references to actual places and structures along Route 66, and featuring the fictional town (Radiator Springs) that imitates both the name and location of a real town (Peach Springs) and implicates many actual settings along the highway.

The Interstate Effect

The film, Cars, accurately depicts the effect that I-40 had on towns along old Route 66, as almost overnight it transformed popular stopping places along a major highway into near ghost towns. Much of the growth that had blossomed along the highway faded into history. Businesses and whole communities died.

It was in 1956 that Congress passed the Federal Aid Highway Act authorizing the construction of the national interstate highway system. While the system as a whole took many years to develop, as each section of Interstate was completed the older routes it replaced suffered immediate consequences. And by 1970, almost all of old Route 66 was bypassed by modern four-lane divided highways. Falling into disuse and disrepair, Route 66 was decommissioned in 1985. But by that time the song, the TV series, and the reality of the nostalgia had already lighted an indestructible fire in the imaginations of Americans. Route 66 simply refuses to be destroyed.

However, not all communities have survived. Even some other industries have reshuffled because of the changes. The auto industry is no exception, with many previous manufacturing plants having relocated. Chicago retains only a shadow of its former contribution to the auto industry, with Ford manufacturing only the Explorer, Taurus, and Lincoln MKS in the Windy City. Today, only General Motors still manufactures vehicles in the St. Louis area. They make the GMC Canyon and Chevrolet Colorado trucks and Chevy Express and GMC Savana vans in the nearby Wentzville plant.

But today organizations and communities have re-energized many parts of the old girl with restoration projects and promotion of her sights, sounds, and memorabilia.

Points of Interest

Hundreds of interesting points remain along this nostalgic path captivating Americans yearning for a connection to the past. Some are thriving businesses, living off of the continuing attraction this highway brings to their door. Others are actual (or practical) ghost towns. One of the more notable communities that now exist primarily as reminders of what used to be, is Texola, Oklahoma. Perhaps one of the most ironically named establishments there, is the Last Stop bar. It is perhaps the only business that remains in operation in the community. Indeed, it is a last stop in several ways.

Never a large community, Texola’s largest census population figure was 581 in 1930. Even during the prime years for Route 66, the town suffered a declining population. Today, there are supposed to be 36 residents, but finding a live person or moving vehicle there is a challenge. Abandoned buildings can be entered at a tourist’s leisure. In 1995, the National Register of Historic Places included in its listings the town’s Magnolia Service Station.

In the movie, Cars, the Cozy Cone Motel is taken from the design of two remaining Wigwam Motels in Holbrook, AZ, and Rialto, CA. Even the name is a reference to another site along Route 66, the Cozy Dog Drive-in in Springfield, IL.

Many museums, gift shops, and memorabilia vendors have grown quite successful along Route 66. One such stop worth noting is the Route 66 Hall of Fame and Museum in Pontiac IL.

At the road’s eastern-most end, a sign post in Chicago beckons the traveler with this message:  “Begin Historic Route: Illinois U.S. 66.” Many maps and books are available to prepare an itinerary for a thorough trip down this historic memory lane. It is well worth the trip, and preparation is a good idea.

A big part of the charm that continues to attract travelers to the quaint and slower-paced scenic route 66 is the fact that it is reminiscent of times gone by, where we lived at a slower pace, with less distraction and more wholesome enjoyment of life. Think of it as a highway connecting you to places a little like Andy Griffith’s Mayberry.

The continuing popular nostalgia of traveling Route 66 is proof that the Interstate has not and apparently cannot kill this proud old matron of travel. If the Interstate is more like actress Kim Kardashian, then Route 66 is our genuine and highly respected Betty White. It is no coincidence that another of the names for this old road is “Will Rogers Highway,” in recognition of another of America’s most cherished figures.

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