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Originally Posted by SM401
I have a 98 Burb that I bought with 100K on it. A new fuel pump had just been put in. A month after I bought it, the gauge started acting up. Read on another site that it was likely a buildup of deposits on the sensor. Recommended using fuel-injector cleaner type additives. Tried that - and eventually seemed to help - but it's acting up again. Not worth the repair cost at this point - so we just hit the trip odometer on every fill-up and then we check the mileage instead of the gas gauge. 400-450 miles for city driving, 600 or so for freeway driving.
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I have a 99 burb with the older body. My guage started "bouncing" about a year ago. I didn't much worry about it, because it wasn't the first car I had with a non-working gauge, but I did start tracking my mileage on paper and with the odometer. I have a tornado fuel saver and the large 44 gal tank, and my mileage started off at about 21 miles per gallon, average. After about 6 months my mileage severly dropped to about 15, then to 13, then 11, and recently I was averaging 7 to 9. At $3 plus per gallon that hurts. Thought all was OK until three days ago when my car died like it was out of gas, this of course was on halloween night with a car load of kids. I had filled up my car on Monday, driven 200 miles. A friend brought me 5 gallons of gas and I couldn't get started. I had to put 18 gallons of gas in my tank to get enough gas to the pump for it to get enough suction to get fuel to the engine. I ended up getting a full year out of my pump after the sensor went out, but my advise would be to track the mileage and fix the pump/ sensor unit when your mileage drops. I am now in crisis repair mode and it stinks.