Question about 1987 Suzuki Samurai

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Temperature gauge problem on a 1987 Samurai

After starting the cold engine, the temp gauge quickly rises to over the top of the readings (above hot) and stays there while driving until the engine is shut off and cools down again. It does not run hot. I replaced the sending unit and did not change anything.

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  • gmp11 Dec 18, 2008

    I got my valves redone, new thermostat and its says really hot the heaters is only warm and the radiator is warm to touch not hot.? do i need lower temp thermostat or ?

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There's two sending units in the intake. The little on with single prong at the t-stat housing is for the guage and the bigger one plastic connector is for ecm.

Your signal is getting grounded somewhere.

Posted on Mar 17, 2009

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If you disconnect the guage sending unit what happens? Are you sure that there is only one sending unit, many Japanese cars use 2, one for normal zone and one for overheat, the last makes the guage quickly go to hot to alert the driver of a problem before the engine is ruined, let me know what you find.

Posted on Nov 25, 2008

  • Robert L Segers Jan 31, 2014

    I have replaced the engine sending unit which has two wires. This did not correct problem

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