Need picture of carburetor vacuum connections and what they connect to
You can get a diagram for a 1922 Atco carburetor as fitted to a Villiers V1C in a book of old diagrams. Or you can even check out the owners manual too.
To get a carburetor diagram for a 22R 1986 Toyota truck, check with local auto part stores. You can also find it in the truck's owner's manual.
The vacuum diagram can be found in a service manual. Your local library may have a copy of the manual that you can check out or copy the diagram from.
Try one of the NAPA or Certified Auto repair shops. If not there then check the auto parts houses or bookstores for a Haynes Manual. It will be worth the investment.
You can find a vacuum diagram for a 77 Datsun B210 in the car's owner's manual. You can also check with different auto stores.
Check the hood and radiator supports for a vacuum lines diagram.
Check your owners manual for a diagram of your vacuum. If you don't have the manual you can call the manufacturer and ask that they send you one.
Check for a vacuum leak. Check all the vacuum hoses first, then check around the carburetor. Check to make sure the carburetor is bolted down tight. When the engine idles, it can suck in a little more air, and still run. Most of the time it will idle faster than normal if there is a vacuum leak, too. When you put the engine in gear, it needs a more precise fuel/air ratio. Hope this helps !!
A vacuum hose diagram can be found in a service manual, possibly available at your local library for check out. You can also buy the manual at most any auto parts.
You can check junkyards,eBay, and other sources.
Probably not. The backfiring is usually caused by a lean condition. Check all your vacuum lines and gaskets for leaks.
You can find a vacuum diagram for a 1991 Ford Bronco 351 Windsor in a Chilton repair manual if the Haynes manual does not have it. You can also check with local auto stores.