LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Gas Gauge Problem

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Old Dec 9, 2007 | 07:42 PM
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Default Gas Gauge Problem

Ever since i got my walbro 255 in, my gas mileage has been horrific. It takes 40 miles to go from 3/4 to E. If i put $10 in at E, the meter will shoot up a little past 1/2. I dont understand this. Theres no way im running this rich. Possibility the sender is bad?
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Old Dec 9, 2007 | 07:53 PM
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Have you filled it all the way up yet? On my car full tank = half a tank. It will go an inch past full and last for over 100 miles.
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Old Dec 9, 2007 | 08:05 PM
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mine doesnt mark empty and i get reads like 120 miles on quarter tank and it marks empty right after 1.4 empty
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Old Dec 9, 2007 | 09:13 PM
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After I put in the walbro 255 in my car it will run out at 1/4. When I fill it up all the way I end up only being able to put in 10 gallons. That and I bent the filler where the cap screws on and if i turn right I get gas on the side of my car.
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Old Dec 9, 2007 | 09:48 PM
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If its only taking 10 gallons them something must have gotten bent. There is around 13-14 gallons in the tank.
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Old Dec 9, 2007 | 11:04 PM
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Originally Posted by AR15 guy
If its only taking 10 gallons them something must have gotten bent. There is around 13-14 gallons in the tank.
Yeah im thinking that somthing is stuck up but ill live with it for now.
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Old Dec 9, 2007 | 11:14 PM
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I believe the LTx are 15.5gal and the LSx are 17gal tanks. I'm pretty sure on the LTx size.

I explained to Razor on AIM that it's just how GM gauges/sending units work. All my GM vehicles drop like a rock after 1/2 tank.
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