Question about 1999 Pontiac Sunfire

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Fuel gage Not reading accurate fuel level

I have a 98 sunfire and the fuel gage is wrong. it will say it is full after 6 gallons on gas when the car hold at least 12-15 how do i fix the gage I have a 1999 Sunfire with the same issue. My wife's 2000 Sunfire does not, the only other difference between the cars other than year is mine is a two door and her's is a four door.

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  • mandas Dec 12, 2008

    I ran out of gas because my fuel gage does not read correctly the guy from AAA said that he sees it a lot in sunfires

  • mdale42 Jan 10, 2009

    the fuel guage on my daughters `99 sunfire is doing the same thing , will the fuel treatment really work or do i need to just go ahead and pull the gas tank and replace it ?

  • Thugorp Jan 22, 2009

    I just bought a 1999 Pontiac Sunfire, and the fuel gauge just bounces around at random. I really want to have it repaired before I drive it for the first time, but my my family's mechanic says it will cost about 700 - 750 dollars to fix.(because the entire tank/pump deeds to be scraped and replaced in order to fix the problem) To be honest he dosen't really want to do it. In his mind it would be a wast of my money because it doesn't efect the actual functioning of the car. I am not sure I am happy leaving it alone though. : /


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I just had my 99 sunfire diagnosed at a pontiac dealer for this same problem and they told me I had to replace the fuel pressure sensor...

Posted on Apr 28, 2009

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Sounds like you got a malfunctioning float on your fuel pump (works like a toilet bowl) try adding magellans mystery oil (you can find it at most part houses like napa ect) to you fuel for a few tanks to see if it can loosen things up if not probably going to need to replace the part

Posted on Dec 04, 2008

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