Question about Jeep Wrangler

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1991 chevy 4x4 truck well not go in revers - Wrangler Jeep Cars & Trucks

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  • Jeep Master
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A chevy jeep, above says 91 jeep wrangler chevy.

a/T or m/T
2wd or 4wd. (are you using when it fails)

Posted on Jan 06, 2014

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 51 Answers

SOURCE: 1991 Chevy Transmission won't go into O/D

from what i remember the overdrive is electronically activated. it is disengaged by low rpm or a switch on the brake pedal. check the pedal switch and look to see if there is a disconnected wire near transmission.hope this helps. please rate me

Posted on Jan 12, 2009

Anonymous

  • 32 Answers

SOURCE: HOW DO FIX A CODE #42 ON 1991 CHEVY TRUCK

Check to see if the brown and black strip wire is dissconnected by the fuel pump relay if not try dissconnecting the battery for a minute and see if the light comes back on.

Posted on Feb 21, 2009

onyeredson

Paul W

  • 404 Answers

SOURCE: 1991 Chevy Silverado Rolls while in Park

Hi, This looks like the Pawl in the gearbox has been broken/damaged or even left out when the box was overhauled.
It lock the gearbox whilst in park so acting like a brake.
It could have occurred if someone put the vehicle in park whilst still moving.
Hope this helps?
Press the Blue button please to appraise My FREE! Effort.
Thank You!
Paul 'W' U.K.

Posted on Mar 01, 2009

honeymokey

honeymokey

  • 3113 Answers

SOURCE: 1991 chevy 4x4 2500, we changed the distributor,

Timing chain and gears may need replacing. Is the timing correct? Like number 1 at top of compression stroke and the dist. is on 1. How about a new coil too. Try a coil first. They go bad on these a lot.

Posted on Jul 12, 2009

ZJLimited

ZJ Limited

  • 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




Keep us updated.

Posted on May 28, 2011

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