C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Bad Gas

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Old Oct 6, 2005 | 05:34 PM
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Default Bad Gas

I think I got a bad tank of gas which is causing the car to miss badly. How much damage am I doing by driving the car to burn off the bad gas? Thanks.
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Old Oct 6, 2005 | 07:03 PM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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If it's a small amount water in there, it doesn't seem like a problem if it at least sloshes and mixes to some extent so you only feed the motor a little water at a time. What else would be in 'bad' gas? Does the gas change into something else? Can it be contaminated? Does water turn into rusty water and feed ironoxide into the motor?
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Old Oct 6, 2005 | 07:05 PM
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Others will weigh in, but I'd say it's not great for the engine, nor a disaster..

My suggestion would be just for peace of mind, take it to a gas station and let them empty out about half a tank. Then put in a can of good isopropyl dry gas and a can of "magic elixir" better known as fuel system cleaner such as Techron. (Maybe even take it to the one you got the gas from! they do have insurance for that---my car stopped dead and I had it towed at the station's expense)

If it really wasn't something else, that should clear it up.
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Old Oct 6, 2005 | 08:05 PM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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The easiest way to drain the tank is to siphon it to the gutter. The second easiest is to disconnect the fuel filter and apply 12V to the aldl port on the lower left(?) and pump it to the gutter.

There are gas additives that help entrain the water I think, making it safer to run bad gas through the motor without stalling it or hydrolocking it.
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Old Oct 6, 2005 | 08:08 PM
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Originally Posted by CentralCoaster
The easiest way to drain the tank is to siphon it to the gutter. The second easiest is to disconnect the fuel filter and apply 12V to the aldl port on the lower left(?) and pump it to the gutter.

There are gas additives that help entrain the water I think, making it safer to run bad gas through the motor without stalling it or hydrolocking it.
But then you kill all the little fishies in the ocean.
On second thought, maybe it will add to the flavor of the mercury laden fish out here. Good tip
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Old Oct 6, 2005 | 09:04 PM
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Naw, animals don't like the taste of gas, they won't drink it.
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Old Oct 7, 2005 | 09:31 AM
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I've had to run Heat (an additive ) through two cars this year because of bad fuel. Here's a tip-never get gas at a station where you see them getting new gas in their tanks-or a tanker just leaving, because when they fill their tanks the new fuel stirs up all the sediment in the tank and guess where it goes not in my cars!
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Old Oct 7, 2005 | 12:33 PM
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Throw some alcohol, quart or so, in the fuel. It will absorb the water and mix with the gasoline. After it seems to be running OK, change the fuel filter where most of the crud should have be trapped. You should be OK.

Last edited by hardlight; Oct 7, 2005 at 01:06 PM.
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