Question about 1983 Ford Ranger

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1983 Ford Ranger carburator running way to rich. How do I adjust it?

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There is a sping loaded adjustment scew at the base of the throttle body of almost all carbs. Correct adjustment is to turn it in clockwise till it stops gently as not to damage internal parts and turn back out 1 1/4 to 2 1/4 turns should be within the optimum range. Realize that many other variables can affect the way your motor runs...

Posted on Oct 02, 2010

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First ensure air cleaner is OK and flow path not blocked. If OK, rebuild carburetor. Float level may be too high or float valve not working right. You can get rebuild kits online. Rebuilt an autolite 2100 recently for only $15. Let me know if you have more questions.

Posted on Oct 02, 2010

  • nicolemcclai Oct 02, 2010

    is there a vacum hose that could be incorectly attaced affect the fuel misture.....its running to rich....

  • Jeff Turcotte
    Jeff Turcotte Oct 02, 2010

    The vacuum hoses are generally to actuate other controls and do not affect the carburetor. I have the vacuum hose diagrams for the 2.3 and 2.8L engines if you have one of these and want to see them. Problem is, resolution on FixYa is not very good for diagrams. I suppose if the PCV and EGR systems were clogged it might run a little bit rich, but not a lot. Your choke is wide open, right? Another thing you can do to troubleshoot is take cover off float bowl and run engine to see wet level of float bowl and observe float valve operation.

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Posted on Jan 02, 2017

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1 Answer

Will 10% Alcohol Gas effect float in new carbureator?


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I am looking for the float adjustment on a 1983 Ford 300 cyl. It is running very rich and maybe needs checking or adjusting. Where do I find this spec.?


The odds that your float is out of adjustment are extremely rare. If your truck is running rich the most common culprit on a carburator is the choke. It runs on a spring and the spring weakens over time leaving the choke plate partially closed all the time. Remove the air breather and check the top of the carb. you will see a plate that should be straight up and down when the engine is warm. with a warm engine that plate should not move when you rev it up. If it moves or is not straght then wire it so it is and run the truck for a few days and see if that helps. It would also help to run a can of combustion chamber cleaner through it. Make sure the engine doesn't stall when you are doing this, keep it revved about 1/2 throttle and don't do it in a closed area. If you can't remember when you last changed plugs and wires, noe would be a good time as well.

If this doesn't correct the problem then it is likely you are gong to have to open the carb. For this you need a carb kit because you can't re-use the old gaskets or re-seal them with silicone. Silicone and carbs don't mix. The kit will include an instruction sheet with a blow-up diagram of the parts and the correct settings for the float and choke adjustments. These kits fits multiple carbs so be sure that the new gaskets are IDENTICAL to the old ones, you'll have some left over. You will also need something to clean the old parts in before you rebuild it. There is no room for close enough in rebuilding a carb so if you are unsure then perhaps you will want to take it to a shop that specializes in that type of work. Ask first and make sure they have experience in carbs. Carbs and fuel injection have as much in common as hot dogs and doughnuts. If they do there job right you will only have to set the idle when you get it back. Hope this helps.

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