1995 Mazda MX6 Erratic Temperature Gauge reading...

1995 MAZDA MX6
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TNFIEND
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Engine Cooling problem
1995 Mazda MX6 4 cyl Manual 178000 miles

I've just bought a 95 MX6 recently and was told that the temp gauge and the fuel gauge will sometimes max out all the way to the right. Sometimes just the fuel gauge will do this, other times it's the temp gauge. Now both gauges are maxed out...I know I have about a half tank of fuel and the temp usually reads around half as well.

I was told by a shadetree mechanic he believes I have a bad coolant temperature sensor. I went and bought one and installed it, the problem still remains. When I installed the new one it didn't go in as easily as the old one and think I may have damaged some threads in the process...however it does not leak. I know this is a lot at once. Please help me sort this mess out. Thank you.
Mar 9, 2009 at 7:25 PM
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2CARPRO JACK
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i would think it to be a possible problem with the printed circuit board on the back of the instrument cluster or a bad connection at the gauges/plug in the back.Look for discoloration in the connections and broken/ cracked spots on the pc board.
Mar 10, 2009 at 7:58 AM
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TNFIEND
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So, you think it's not the sensor or even the coolant temp sender?
Mar 10, 2009 at 9:09 AM
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2CARPRO JACK
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I doubt it, that wouldnt change the reading of the fuel gauge.It is something those 2 gauges share.
Mar 10, 2009 at 9:29 AM