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Old 06-29-2009, 07:25 PM   #1
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Default Power to fuel pump?

Hi, I am trying to drain the gas tank on my 96 Bonney. Fuel filter has been removed. Dropping the tank is not an option.

I was told the best way to do it is to apply power to the fuel pump. I saw somewhere here that there may be a way to do near the battery.

I also see the wiring loom go behind the back seat, and thru the floor into the trunk. I found a diagram saying either the gray wire, or the red wire will give the pump power.

Once I find the power wire, How do I apply it? Ideally I would like to run 20 amps at 12 volts, would a lead from the cigarette lighter work?
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Old 06-29-2009, 09:41 PM   #2
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What is your goal doing this? I understand remove all the gas but for what reason?
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Old 06-30-2009, 12:19 AM   #3
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The car sat for 3 years, and was started intermittently. We added 5 gallons of fresh fuel to the 2 gallons of crap that was in there. We got it to sputter, thats about it.

The stuff I am pulling out has a fair amount of water in it, and only faintly smells like gas. My wife has a bad reaction to the smell of gas, this stuff she hardly notices.

No engine codes, I figure drain & fill the gas & hope for the best. I dont want to drop the tank, the hanger bolts on this look like a bitch to get at, are rusted beyond recognition, and the fewer 13 year old hoses I disturb, the better.
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Old 06-30-2009, 12:30 AM   #4
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ahhh I see.

Well I've done 3 fuel pumps on Bonneville'* before and taking out the gas tank is not as bad as you may think. I even had my wife help me on the last one. As an alternative to completely dropping the tank you could jack the car up and from under the car disconnect the filler tube and siphon out the gas that way. Only there is baffles in there so you may not be able to remove 100% of the gas.

Have you tried adding fuel line deicer in the gas you have? That may be all you have to do. the gas in there is only 3 years old......
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Old 06-30-2009, 12:44 AM   #5
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The problem with just using the fuel pump to remove the gas is that the pump relies on the gas to stay cool so it does not burn out. So you will run the risk of burning out your pump doing it that way. If you do than you will be forced to drop the tank anyways
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Old 06-30-2009, 12:48 AM   #6
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It may come to dropping the tank, but The bolts are rusted to chit, and will need to be cut, no room for a sawzall. I tried siphoning out the gas, it seems the last gallon is the most difficult.

Yea, I added seafoam and drygas to the aforementioned 5 gallons of fresh gas / 2 gallons of crap. Thats the only thing that got it to sputter, before that, it would not fire at all.

My goal now is to pump every last gawd forsaken drop out, and would like to get the fuel pump working to do that.

Edited <---watch the language please.
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Old 06-30-2009, 12:56 AM   #7
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If you wanted to.........and I in no way approve of this method......disconnect the fuel line at the filter and just cycle the ignition switch a few times to pump out the gas that way until nothing is left.

But remember you will risk burning up the pump!
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Old 06-30-2009, 01:02 AM   #8
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Once you have removed all the fuel and put in fresh you may want to replace the spark plugs and fuel filter for sure. Though I'm sure you will

Hope it all turns out well for you.

Keep us informed so we can help!
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Old 06-30-2009, 01:05 AM   #9
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thats what Ive been doing, and it only releases a thimble full at a time. I usually do it 5 or so times, let it rest, repeat. I have been listening for a change in the sound of the pump, but no change yet. At this point, I am willing to risk frying it. If I have to drop the tank, I will wind up changing it anyway.
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Old 06-30-2009, 01:08 AM   #10
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You could add fresh gas at this point just to dilute the crappy old stuff and continue to pump it out.

Though I find it hard to believe that even at this point with having such a small amount of old gas in there that the car will still run like crap or not start up at all!

.....
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