Question about 1986 Chevrolet Chevy

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Need help figuring out what's going on with my truck 1986 Chevy truck (305, quadrajet carb ). Can't start it with out using starting fluid or adding gas to carburetor. Once started, runs smooth, until I try to take it out on the road. When accelerating it starts to choke out. Any help will be greatly appreciated!

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The carb on that engine has an electric choke. Make sure it is closing all the way when the engine is stone cold. You also have a vacuum operated choke pull off that opens the choke plate partially to prevent flooding. That should happen as soon as the engine starts.
You also need to check the accelerator pump. Do that by looking down into the carb and working the throttle. (with the engine not running) You should see two squirts of fuel, one in each front venturi. If you do not see it, the pump is bad and the carb needs to be rebuilt or at least the pump part replaced. That will cause a bad stumble off the line because the added fuel overcomes the transition from the idle circuit to the run circuit in the carb. With that not working the engine will fall flat on it's face on acceleration, either bogging or completely stalling.
I don't think I need to say this but on a carbureted car, you need to pump the gas a few times before start up, unlike injected engines where you just turn the key and go.

Posted on Mar 20, 2011

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Carb needs rebuilt, Auto choke not working properly. Be easy on the starting fluid you can easly blow a hole in top of piston.

Posted on Mar 20, 2011

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