1998 Nissan Maxima temperature gage rises and falls

1998 NISSAN MAXIMA
143,000 MILES • 4 CYL • 4WD • AUTOMATIC
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K3BRIMSTONES
  • MEMBER
  • 1 POST
This car is a salvage title and was sitting at the buyers parkway for a while. The car runs smooth and fine. But from the second day after I bought it, the temperature gage rises and falls along with the acceleration. No oil/coolant leaks can be seen and I had thermostat changed today but it did no good. One mechanic said the engine is bad and needs to be replaced. I don't want to believe that. Please help and thank you for your time.
Nov 4, 2008 at 1:25 AM
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ZACKMAN
  • CAR REPAIR CONTRIBUTOR
  • 4,202 POSTS
Try replacing your temp sending unit. It could be just that.

To refute what the technician says about the engine being bad, perform a compression test on all cylinders. If they are within less than 20% difference, the engine is good.
Nov 6, 2008 at 8:59 PM
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