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Ran out of gas WTF???

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Old 01-13-2009, 12:31 AM
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Question Ran out of gas WTF???

ok well my gas gauge has been out of sync for awhile but I always new how many miles the gas on my car would last me. I always fill up the tank and reset the trip distance. I know that I get about 300miles on a full tank so I usually fill up at 270miles most would be 290miles. But today I ran out of gas at 230miles..WTF??? I did the same procedure of reseting my trip and I ran out of gas. Funny thing was that when i filled up my car filled up with like 16gallons and I thought the car had a 15 gallon tank. I just installed a cut out, and now my car kind feels like it might turn off when im at a stop..the car vibrates a lot and sounds like if the car is choking kinda like if I had a cam. I descreened the MAF but i don't think that's the problem...any ideas what it might be? should I be worried?...sorry for the long post..
thnx
Old 01-13-2009, 12:48 AM
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Maybe you have a misfire..
Old 01-13-2009, 12:56 AM
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lead foot syndrome?
Old 01-13-2009, 01:42 AM
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your car took 16 gallons? The gas tank holds 16.8 gallons, and its terrible for the fuel pump to let it go under around 13.5 gallons. People have run out of gas at 14 gallons, its in the design of the tank as the fuel actually cools the fuel pump.
Old 01-13-2009, 05:41 AM
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Originally Posted by slow1999blackz28
lead foot syndrome?
...x2
Old 01-13-2009, 06:54 AM
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^^ It happens, the worst I got on a tank of fuel was 150 miles
Old 01-13-2009, 07:37 AM
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Well you may have leadfoot syndrome, but I'd be more concerned about the idling issue you have. And FYI be prepared to get flamed for descreening your MAF. And your problem may potentially be there. Are there any codes being thrown? As The Merv said a misfire may be the problem as well. Many people have fouled plugs by fiddling with their MAFs. Swap MAFs with a buddy and see if it resolves the problem, or get some electrincs cleaner @ auto zone and clean your MAF. I for one would pull the plugs and see if the problem lies there. Hope you get it lined out.
Old 01-13-2009, 07:37 AM
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when is the last time you changed the plugs and wires? might want to look at some of them.
Old 01-13-2009, 12:42 PM
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A4 cars do not descreend MAFs. M6 cars like it for some reason. You might want to change your fuel filter?

Also i preach this to EVERYONE. Never let your tanke get below 1/4. This will kill your fuel pump if you do that. The fuel is desgined to keep the fuel pump cool, when it get below 1/4 tank, your fuel pump runs hot.
Old 01-13-2009, 02:21 PM
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^^I'm sure that the most of you have never taken the Sending Unit out of your Tank, but the Return Line actually sprays Fuel over the Pump when it comes back into the Tank..
Old 01-13-2009, 02:35 PM
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Originally Posted by TireSm0ke
its terrible for the fuel pump to let it go under around 13.5 gallons.
For the last time, IT WON'T HURT THE PUMP TO RUN OUT OF FUEL IN A 99-02 LS1 F-BODY!

The 1999 & up LS1 F-body cars have a pump that is inside a plastic fill-bucket. The fill-bucket is equipped with two inlets on the bottom. The equalization checkvalve is used to fill the bucket when the level of fuel in the tank is greater than in the bucket. The equalization checkvalve does not allow fuel to exit the bucket. The venturi system's inlet is a combination checkvalve and powered suction system. The factory pump supplies pressurized fuel via a small tube which feeds a calibrated jet inside the venturi system. This jet of fuel shoots across the base of the checkvalve inlet thereby creating a suction effect which draws more fuel from the bottom of the tank through the filter sock. This venturi system keeps the bucket full all the time even when the fuel tank is almost empty. A full bucket keeps the pump immersed in fuel regardless of the tank level so that when the tank is low on gas and you are doing some hard cornering or acceleration the pump does not run dry and start aerating (air bubbles) the fuel. This happens as the fuel sloshes from side to side in the tank leaving the center low on fuel. This can cause detonation and possible engine damage. The 99+ F-LS1 cars with plastic tanks have no baffling in them so the bucket is very important. The bucket also allows the car to operate with lower fuel levels in the tank due to its scavenging effect. The fill-bucket improves motor crank-to-run time as the priming time is reduced under most conditions. The return line feeds the pressure regulator on the fuel module which diverts fuel back into the bucket so that the unused fuel also helps keep it full at all times. Keeping the pump constantly immersed in gas within the bucket can extend the pump's life by not allowing it to be exposed to open air. Open air within the tank contains moisture and in time will cause the pump to rust / seize up especially if left to sit for long periods of time without the tank topped-up (i.e. winter storage).
Old 01-13-2009, 02:45 PM
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[QUOTE=9000th01ss;10840018]For the last time, IT WON'T HURT THE PUMP TO RUN OUT OF FUEL IN A 99-02 LS1 F-BODY!


Well **** I have a 98....
Old 01-13-2009, 03:24 PM
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Originally Posted by TireSm0ke
your car took 16 gallons? The gas tank holds 16.8 gallons, and its terrible for the fuel pump to let it go under around 13.5 gallons. People have run out of gas at 14 gallons, its in the design of the tank as the fuel actually cools the fuel pump.
so if its terrible for your car to run on less than 13.5 gallons of gas.. i could fill up to the tiptop and turn my car on and run out of gas.... i only have 12.5 gallon tank..

you cant run out of gas if you have 14 gallons of gas.. thats just retarded... can your fuel pump take a **** on you? yes..... but you CANT RUN OUT of gas on 14 GALLONS OF GAS!!!!!!

see the irony in that statement?

Originally Posted by Joshiedoom
Well **** I have a 98....
for realy josh... what about us losers?
Old 01-13-2009, 03:34 PM
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you could be running really rich, or lead foot syndrome




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