Question about 1966 Ford Mustang

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Carb gas pouring out of hole on top front of carb

66 Mustang 2 barrel carb Gas pouring out of hole on top front of carb just tried starting it 1st time in 4 mos

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  • Anonymous Mar 24, 2014

    sputters when get on gas

  • Anonymous Mar 27, 2014

    this engine has not been started in approx.4 years. I poured gasoline in the carb. it runs until all the gas in the carb.is gone. then it quits.

  • Anonymous Mar 31, 2014

    i have a holley 500cfm 2 barrel carb engine runs on 4 cyl at idle and runs on 8 1100 up cleaned idle jets main jets and all holes in metering block etc have bolted autolite carb on to try and engine runs perfectly got me beat

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Sounds like the float has absorbed gasoline and can't ftoat anymore. This causes the fuel to not be shut off when float bowl is full causing the carb to flood. You will have to buy a carb kit and a float and rebuild the carb. Hope this helps.

Posted on Feb 15, 2009

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1 Answer

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do you have gas at carb? is there spark? find the answer to those questions and you might get somewhere.

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Why is gas pouring out of top of my Holley carburetor on a 305 8 Cylinder? While turning the key over to crank it, it steadily pours gas out of a port hole on the (front top) of carb and starts to smell...


The float may be stuck, or the needle valve that lets gas into the carb may be stuck open. Is there a sight glass to see the fuel level? If not you may have to take the top of carburetor off.

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I need a diagram of a 4 barrel carb. i don;t know what a mixture screw adjust butterfly position and float level means.


The mixture screws are at the bottom front of the 2 front barrels. They poke into the barrels from outside the carb.
Butterfly usually refers top the throttle plates that open and close the barrels, but if you have a quadrajet, they may also refer to the upper plates on the back 2 barrels that only open when the throttle is wide open.
The float level is the distance of the top of the float when the float valve is closed. As gas flows into the bowl thru the float valve, the float rises and eventually closes when the proper float level is reached by the gas.

Look here for example: http://www.holley.com/data/Products/Technical/199R8339.pdf

Sep 06, 2010 | Chevrolet Chevy Cars & Trucks

1 Answer

Just bought a 1984 mustang its not run for years and wont start it turns over getting gas to the carb and has fire not sure about wiring


Any time a car sits for a long period of time you should completely drain the gas tank. The gas is more then likely stale. Try pouring a little new gas into the carb or use starting fluid. If it starts you have found your problem and will more then likely have to drain and clean the tank and replace the fuel filter.
If it does not start with the new gas, it is either a compression or timing issue. If you have spark at the plugs, and GOOD fuel in the carb and it still wont start I would check the timing. If the timing is on, check compression. If the engine sat to long with no oil in the cylinders they can build up condensation and rust. Then when you try to start it with the rust in the cylinders it can destroy the rings and cause compression loss.

Apr 08, 2010 | 1984 Ford Mustang

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My 67 mustang has a 4 barrel demon carb, its nearly impossible to start, won't stay running without pushing accelerator to about 2000 rpm, and there's gas pooling on top of the carb. I thought 1 problem...


Are you using the stock mechanical fuel pump or an electrical one?

If it's an electrical then you may install one with too much psi and gpm/gph flow rate.

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The other potential case is stuck fuel float or miss adjusted angle on the flow arm.


Nov 05, 2009 | 1966 Ford Mustang

1 Answer

Between 50 and 60 mph my 66 Mustange surges.


If you are like me You only want someone to Answer this that has been there. The Carb needs Adjustment. One barrels are Notorius for loosing Adjustment, Especially since it is the Original. Drop me an E-Mail and I will send you Pics of MY Babies!!!! MrScary6661313@aol.com

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VAC LEAK AT CARB GASKET OR LINE /PUMP IN CARB IF BEEN SETTING BUT LIKLY VAC PROBLEM

Jan 02, 2009 | 1966 Ford Mustang

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I have a 1981 Toyota 4WD with a 22r engine. Truck has been sitting up for about 8mos. I purchased it and got it home. The only way I can start if is by pouring gas in carb. I have replaced all vac lines...


check the fuel pump, maybe it is not working. if you put a new accelerator pump, I wonder if it's same as the fuel pump. if so, maybe you need to rebuild your carb, clean the small fuel line in the carb, something block there.

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