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remove the air cleaner to gain access to the top of the carbuerator and then use 2 skinny screwdriver handles and hold the primary and secondary choke butterflys open. press the gas pedal to the floor and crank the engine. this should allow more than enough air to mix with the overabundance of fuel and the engine to start. a small shot of starting fluid just prior to cranking helps. this is a common problem with theese cars. best way to avoid it is to start car as follows. 1- before touching gas pedal turn ignition to on position. 2- press the gas pedal 1 time to the floor and let go. 3- with no foot on gas pedal crank the engine car should start right up.

a helpful hint theese cars have that big 4 barrel carb which dumps a lot of gas into a small 305 engine. to ensure good starts in winter put fresh spark plugs in as soon as temps dip below freezing

The above answer is good advice however I disagree with parts such as pressing the pedal all the way down once and letting it up. That is the method used to "set the choke" which you don't want on a flooded engine.. Try this before messing with the carburetor.

Assuming by flooded, you mean with gasoline not water, what you need to do is slowly press the accelerator all the way to the floor and hold it firmly against the floor then crank the engine. The engine will turn rather slowly at first since it is impossible to compress fluid but as the gasoline is pushed out, the engine will eventually fire. I hope I do not have to remind you to let off the accelerator after the engine starts. Yow will see a cloud of black smoke come out which is normal.

Do not crank for more than 10 or 15 seconds or you can damage your starter. Do not pump the gas pedal as that squirts more fuel into the carb through the accelarator pump and will amplify the problem. One I the best suggestions I can give is to just wait 15 minutes, then try.

This procedure is for cars with a carburetor only, do not use this on fuel injected cars. On those never touch the gas pedal before or during startup.


On many fuel injected cars there is something called "clear flood mode". This is done when you do hold the accelerator to the floor. Fuel injectors will not pulse causing the gas to expelled out of the exhaust. The PCM sees the throttle position sensor at 5 volts (erroneous) and recognizese you are in clear flood mode.

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โˆ™ 2015-07-15 21:33:58
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Q: How can you unflood a 1983 Chevy Caprice engine?
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