1991 toyota corolla 1.3l heat gage and fuel gage running past h and f mark off gages what can the problem be

1991 TOYOTA COROLLA
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ROBERTMARSHALLX
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the heat gage and fuel gage is going past the full mark and the overheating mark,we replaced the thurmostat..
Oct 11, 2011 at 11:35 AM
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JACOBANDNICKOLAS
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Check body grounds. Also, make sure the engine isn't overheating. Check sending unit in fuel tank.
Oct 11, 2011 at 12:14 PM
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KHLOW2008
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Check the gauge ground circuit.
Oct 11, 2011 at 5:07 PM
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