LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

need to get old gas out,fuel pump prime?

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Old Mar 14, 2006 | 09:44 PM
  #1  
kirschman's Avatar
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From: kentucky
need to get old gas out,fuel pump prime?

I'm bout to fire my new motor up and I've got about a 1/4 tank of gas thats 3yrs. old. The intake is still off and I was wondering if i could just run a 12v to the fuel pump prime lead and pump the old gas into a container. It really sucks dropping the tank.
Old Mar 14, 2006 | 09:49 PM
  #2  
OBE1 95Z28's Avatar
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From: San Diego, CA
Re: need to get old gas out,fuel pump prime?

Not sure if a 96 is wired the same but here's a photo of a 95 fuel prime connector from Shoebox's site:

http://shbox.com/1/fuel_pump_prime.jpg
Old Mar 14, 2006 | 10:15 PM
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Re: need to get old gas out,fuel pump prime?

That's exactly what I did. I took off the fuel rails and put the open end of the lines down into an old gas can. Then I jumped the prime connector and let it run until almost all of the old fuel was out. I didn't want to run the pump dry.
Old Mar 14, 2006 | 10:17 PM
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Re: need to get old gas out,fuel pump prime?

From the pic it says its the red wire, pcm is out for tuning so i'll check it out. Is it cool to do this? I was just going to put the fuel lines in a container and pump "most" of the gas out, i know its not good to run the pump dry.
Old Mar 14, 2006 | 10:19 PM
  #5  
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Re: need to get old gas out,fuel pump prime?

Cool, posted for I had a chance to reply. I figured that would be alot easier than dropping the tank, thanks
Old Mar 14, 2006 | 10:58 PM
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Re: need to get old gas out,fuel pump prime?

I wonder if you could just throw some 109 octane in there... it should mix it out.
Old Mar 15, 2006 | 09:39 AM
  #7  
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Re: need to get old gas out,fuel pump prime?

A tank that's been sitting unused and partially full for 3 years could be badly rusted. Might be a better idea to drop it and have it cleaned.
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