Hi:
It could be many things. Since mine was doing the same and it was a map sensor, I would like to point you in that direction, but would rather do some checking first. Even if the ck engine light isn't on, have the computer scanned for trouble codes. Most parts stores will do it for free. Let me know what you find.
As far as the fuel gauge, the float is part of the fuel pump, and they go bad. THe pump may be fine, or it could be causing the problem, but regardless, the float is most likely the problem with your fuel gauge.
Joe
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Wednesday, December 3rd, 2008 AT 9:31 PM