Question about 1989 Chevrolet G20

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The van will start, but have to push pedal to the floor, once it starts it will idle great but dumps a lot of gas into the carb., once you push down on the pedal it dies.

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Carb problem sounds like choke is stuck or float is stuck remove cover and air cleaner and watch operation when starting see if choke blade is open or shut on carb and if shut watch to see if it opens when u let it idle. if not choke pull off solenoid is bad. if working tap on carb to free float.if that don't work carb may need to be rebuilt or get new one .

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http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

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You don't want to start throwing money at this thing without knowing what the problem really is; Yes, it could be a module or a coil, but it probably isn't. Electronic parts don't usually suffer from idleness, fuel systems do. The first clue is that it sat for 7 months and then ran for fifteen seconds. The fix's you try first for are the cheap ones. I would suspect a fuel problem; gas doesn't like to sit around for 7 months. Does the van have a carb or is it fuel injected? Carbs can varnish up from gas sitting in them; spraying carb cleaner in and around them will often loosen things up, in a worst case it'll have to come off the motor and be rebuilt. If the gas tank was low on gas for that seven months you'll probably have a lot of condensation in it. Water doesn't burn, so that'll keep it from starting and running, a couple of cans of Heet (isopropyl achohol) will usually fix that. If there's dirt in the system, the fuel filter will probably need to be changed. If those things don't help, you'll find it much less frustrating and usually cheaper to tow it to a reputable shop. They'll fix it right the first time.

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