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Were is the temperature sensor on a 1991 chevy 4.3l engine?

Posted by Anonymous on

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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csmock132
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SOURCE: i search the temperature sensor

The temp sensor for the gauge is in the drivers side head between the #1 and #3 spark plugs. The one for the computer (if you have a ccc carb) is in the intake by the thermostat housing.

Posted on May 30, 2009

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SOURCE: temperature gauge not working after coolant

the senor might not be grounded well after replacing it.. try cleaning it off first then reinstalling

Posted on Feb 16, 2010

ZJLimited
  • 17970 Answers

SOURCE: "1991 Chevy Cheyenne 4X4 K1500

The Engine Coolant Temperature (ECT) sensor is mounted in the intake manifold and sends engine temperature information to the ECM. The ECM supplies 5 volts to the coolant temperature sensor circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold (internal resistance high), the ECM monitors a high signal voltage which it interprets as a cold engine. As the sensor warms (internal resistance low), the ECM monitors a low signal voltage which it interprets as warm engine.

zjlimited_1301.jpg

Fig. 1: Engine Coolant Temperature (ECT) sensor location-4.3L, 5.0L and 5.7L engines


TESTING

  1. Remove the ECT sensor from the vehicle.
  2. Immerse the tip of the sensor in container of water.
  3. Connect a digital ohmmeter to the two terminals of the sensor.
  4. Using a calibrated thermometer, compare the resistance of the sensor to the temperature of the water. Refer to the engine coolant sensor temperature vs. resistance illustration.
  5. Repeat the test at two other temperature points, heating or cooling the water as necessary.
  6. If the sensor does not met specification shown in the temperature versus resistance chart, it must be replaced.
  7. The sensor may also be checked in the vehicle. Unplug the sensor and attach a digital ohmmeter to the two terminals of the sensor.
  8. Using a calibrated thermometer, compare the resistance of the sensor to the ambient air temperature.
  9. Repeat the test at two other temperature points, heating or cooling the water as necessary.
  10. If the sensor does not met specification shown in the temperature versus resistance chart, it must be replaced.
zjlimited_1302.jpg

Fig. 3: The ECT sensor is usually located near the thermostat housing



zjlimited_1303.jpg


Fig. : Engine Coolant Temperature (ECT) sensor wiring diagram



zjlimited_1304.jpg


Fig. : Engine Coolant Temperature (ECT) sensor temperature vs. resistance values




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Posted on May 28, 2011

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a8b6fbb.jpg

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