Question about 1995 Chevrolet Monte Carlo

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In my 95 z43 the check engine light comes on and goes out as i am driving to me it seems electrical and i replaced the throttle position sensor and the idle air control sensor both did not fix the problem it runs fine but when the light comes it starts doggin and it hurts performance

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The check engine light comes ON when the cars computer(the ECU) notices any kind of electrical problem in car.In some cases the check engine light comes on then turns off.In that case the exact error is not getting confirmed so this happens.But once the problem gets confirmed the engine light will remain permanently ON till the problem gets solved.In this case i suggest you to get your car scanned at autozone service center.Its absolutely free.In case in the car scanning,if any error code is retrieved then you can check which part is faulty as per the error code.In case if no error code is retrieved then you can continue driving,till you get any confirmed indication. ---------- This will help.Thanks.Helpmech.

Posted on Nov 12, 2010

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How do you replace the TPS


Throttle Position Sensor Replacement
  1. Disconnect the negative battery cable.
  2. Remove the generator.
  3. Disconnect the throttle position (TP) sensor electrical connector.
  4. Remove the TP sensor attaching screws
  5. Remove the TP sensor
  6. Remove the TP sensor O-ring seal
Installation Procedure



  1. Install the TP sensor O-ring seal (7) on the TP sensor (6).
  2. Install the TP sensor on the throttle body with the throttle valve in the closed position. Make sure the TP sensor lever lines up with the TP sensor drive lever on the throttle shaft.
  3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  4. Install the TP sensor attaching screws (5).
  5. Tighten
    Tighten the screws to 2 N·m (18 lb in).
  6. Connect the TP sensor electrical connector.
  7. Install the generator.
  8. Connect the negative battery cable.

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