Question about 1987 Isuzu Trooper

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Engine idles up when turn heater blower on - 1987 Isuzu Trooper

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My idle up when turn on the ac and step the gas pedal with 1987 isuzu trooper ii.

Posted on Aug 07, 2011

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When i turn my heater on (blower) my car tries to stall out. What can cause that to happen?


most likely your ac compressor is locked up. see if you can disconnect ac compressor clutch at compressor. if problem goes away, you can use heater without any problems..

Dec 15, 2012 | 2004 Dodge Stratus

2 Answers

Heater gets warm the goes Luke warm when blower is turned on


when you put the heater on hot and the blower on full and the car is running at idle, the coolant in the heater matrix is cooled quickly,as when the radiator fan comes on to cool the engine, have you tried raising the revs and checking the heater to see if it gets hotter. If this does not happen you could have air lock in the cooling system and may need bleeding properly.

Mar 23, 2012 | Ford Focus Cars & Trucks

1 Answer

The steps please to remove the heater blower motor on a 1995 Park Ave. The check engine light comes on readily when driving or idling. The numerical external temperature/heater temperature setting...


  • Disconnect the negative battery cable.
  • Disconnect the blower motor lead connector from the wiring harness connector.
  • Remove the blower motor cooling tube from the blower motor.
  • Remove the four retaining screws.
  • Turn the motor and the wheel assembly slightly to the right so that the bottom edge of the mounting plate follows the contour of the wheel well splash panel.
  • Lift up on the blower and remove it from the blower housing.
  • Installation the new blower motor by reversing the removal steps.
  • Connect the negative battery cable.
  • Jan 02, 2011 | 1995 Buick Park Avenue

    1 Answer

    2006 grand prix heater only blows cold air. both heater hoses are hot blower motor works fine.


    Sounds like the temperature blend door actuator may be bad or the vacuum hose to it is disconnected.

    Poor Heater System Performance CAUTION
    Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
    1. Start the engine.
    2. Idle the engine until the thermostat opens (upper radiator hose will be hot) Is the engine at normal operating temperature (approx. 200° F)? If yes, go to the next step. If no, go to step 16.
    3. Set the mode selector to FLOOR mode.
    4. Set the heater control selector to the warmest temperature setting.
    5. Set the blower speed the lowest setting.
    6. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 14. If no, go to the next step.
    7. Set the mode selector to PANEL mode.
    8. Select the maximum blower speed.
    9. Select the warmest temperature setting.
    10. Place a thermometer into the center I/P PANEL air outlet and affix a second thermometer to the heater core outlet heater hose.
    11. Record the temperature at the center I/P PANEL air outlet and at the heater core outlet heater hose. Are the two temperature readings about equal? If yes, go to the next step. If no, go to step 13.
    12. Inspect and repair the cowl, cowl area, recirculation door, and the HVAC evaporator/heater core case for cold air leaks. Repair any problems found, go to step 17.
    13. Inspect the temperature door operation. Repair any problems found, go to step 17.
    14. Turn OFF the engine. Back-flush the heater core. Start the engine. Select the FLOOR mode and the lowest blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Is the inlet heater hose feel significantly hotter than the outlet heater hose? If yes, go to the next step. If no, go to step 17.
    15. Replace the heater core. When the repair is completed, go to step 17.
    16. Check for low engine temperature problems, Repair or replace as needed, go to step 17.
    17. Operate the system in order to verify the repair. If the system operates properly, the repair is complete. If the heater still does not work properly, repeat the entire procedure.

    Nov 19, 2010 | 2006 Pontiac Grand Prix

    1 Answer

    The heater a/c or defroster will not work in my car no air will blow through the vents


    Is the fan turning (do you hear it)? If it's blowing, but not passing the blend door, then that would describe why it doesn't deliver air to the passenger compartment.

    Poor Heater System Performance CAUTION
    Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
    1. Start the engine.
    2. Idle the engine until the thermostat opens (upper radiator hose will be hot) Is the engine at normal operating temperature (approx. 200° F)? If yes, go to the next step. If no, go to step 16.
    3. Set the mode selector to FLOOR mode.
    4. Set the heater control selector to the warmest temperature setting.
    5. Set the blower speed the lowest setting.
    6. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 14. If no, go to the next step.
    7. Set the mode selector to PANEL mode.
    8. Select the maximum blower speed.
    9. Select the warmest temperature setting.
    10. Place a thermometer into the center I/P PANEL air outlet and affix a second thermometer to the heater core outlet heater hose.
    11. Record the temperature at the center I/P PANEL air outlet and at the heater core outlet heater hose. Are the two temperature readings about equal? If yes, go to the next step. If no, go to step 13.
    12. Inspect and repair the cowl, cowl area, recirculation door, and the HVAC evaporator/heater core case for cold air leaks. Repair any problems found, go to step 17.
    13. Inspect the temperature door operation. Repair any problems found, go to step 17.
    14. Turn OFF the engine. Back-flush the heater core. Start the engine. Select the FLOOR mode and the lowest blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Is the inlet heater hose feel significantly hotter than the outlet heater hose? If yes, go to the next step. If no, go to step 17.
    15. Replace the heater core. When the repair is completed, go to step 17.
    16. Check for low engine temperature problems, Repair or replace as needed, go to step 17.
    17. Operate the system in order to verify the repair. If the system operates properly, the repair is complete. If the heater still does not work properly, repeat the entire procedure.
    Insufficient Defrosting CAUTION
    Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
    1. Start the engine, select the DEFROST mode, and select the maximum blower speed. Does sufficient air flow from the defroster outlets? If yes, go to the next step. If there is insufficient airflow, go to step 9.
    2. Measure the engine operating temperature. Does the engine reach normal operating temperature (approx. 200° F)? If yes, go to the next step. If the engine does not reach normal operating temperature, go to step 7.
    3. Select the minimum blower speed. Select the warmest temperature setting. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 10. If the hose temperature feels approx. the same, go to the next step.
    4. Test the operation of the A/C compressor clutch. Does the A/C compressor clutch engage? If yes, go to step 6. If the compressor clutch does not engage, go to step 5.
    5. Inspect A/C compressor clutch and controls. Repair or replace as needed, go to step 13.
    6. Determine if the A/C system is operating within specifications. If yes, go to step 8. If no, go to step 11.
    7. Check the low engine temperature problem. Repair any problems found, go to step 13.
    8. Inspect for correct operation of the recirculation door. If the door is operating correctly, go to step 13. If the door is not operating properly, go to step 12.
    9. Check air delivery system. Repair any problems found, go to step 13.
    10. Check the heater core for blockage. Repair or replace as needed, go to step 13.
    11. Check A/C performance. Repair or replace as needed, go to step 13.
    12. Repair the recirculation door concern. When the repair is complete, go to step 13.
    13. Operate the system in order to verify the repair. If the system is operating properly, the procedure is complete. If the system is still not providing proper defrosting, repeat the entire test.
    Noise from Blower Motor
    1. Inspect the air inlet grille for debris. If the grille has debris, go to step 7. If the grille is clear, go to the next step.
    2. From inside the vehicle, close all vehicle doors and windows, turn ON the ignition, with the engine OFF, and cycle the blower motor through all speeds in order to determine where and when the noise occurs. If noise is heard during the blower operation, go to step 3. If there is no noise, go to step 10.
    3. Inspect for excessive vibration at each blower motor speed by feeling the blower case. If there is vibration, go to step 5. If no vibration is present, go to the next step.
    4. Listen to the blower motor at each blower speed. Is the blower motor making a squeaking or chirping noise? If yes, go to step 8. If no noise exists, go to step 10.
    5. Remove the blower motor, and inspect the blower motor and impeller for deposits of foreign material. If there is debris, go to step 7. If there is no debris, go to the next step.
    6. Inspect the blower motor impeller for cracked blades, loose impeller retainer, or improper impeller alignment. If any of these conditions exist, go to step 8. If none of these exist, go to step 9.
    7. Remove the foreign material, go to step 10.
    8. Repair or replace blower motor or impeller as needed, go to step 10.
    9. Install the blower motor, go to step 10.
    10. Operate the system in order to verify the repair. If the condition has been corrected, the repair is complete. If noise still exists, repeat the entire procedure.

    Nov 06, 2010 | 2006 Kia Sportage

    1 Answer

    Saturn 2001 SL idles in neutral between 2000 and 3000 after engine gets warmed up. also blower for heater has bad resistor were is it located so i can replace it?


    high idle concern is probably caused by either a sticking throttle plate, defective IAC or the computer is commanding the high idle for another reason.

    the blower motor is found behind the glove box in the HVAC case

    Apr 10, 2010 | 2001 Saturn SL

    1 Answer

    Heater blows cold air ,at idle and blower motor off,if you wait a couple of min and turn on blower it will blow warm air for a few mins then back to luke warm. i replaced thermostat did not help


    the heater control valve is not opening all the way.
    look under the hood on one on the heater hoses .
    you should find a vaccum controled heater hose valve.
    make sure your not low on coolant also.
    also make sure none of the heater hoses are pinched off.

    Nov 25, 2009 | 2000 Chrysler Sebring

    2 Answers

    Heater fan wont shut off when ignition is turned off.


    Should have a blower control unit. Sometinmes these are known to leave the blower running on low speed with the key off.

    Oct 13, 2009 | 2003 GMC Envoy

    2 Answers

    FUSE BOX DETAILS


    left to right...
    1. empty
    2. e flashers
    3.horn, brake lights
    4.clock, trunk light, inside light, radio
    5. rad. cooling fan relay (AC only)
    6. right side running lights
    7. left side running lights
    8. right high beam and indicator
    9. left high beam and indicator
    10. right low beam
    11. left low beam
    12. reverse,turn signal and inst panel
    13. main and transfer fuel pumps, auxiliary air reg., ox sensor heater
    14. license plate and glove box light
    15. wipers
    16. rear defogger
    17. heater blower (no AC)
    18. cig lighter
    19. rad cooling fan (no AC)
    20. Heater blower (AC)
    21. rad cooling fan (AC only)
    22. empty
    23. Ox sensor, idle stabilizer,seat belt warning relay, (Digifant only, control unit, idle boost control, idle boost valve)
    24. inst panel lights, heater control lights
    25. reading lamps
    26. empty
    27. empty
    28. empty

    Hope this helps...;-)

    Apr 17, 2009 | 1992 Volkswagen Fox

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