Toyota Camry 1983-1996 Repair Guide

Cold Start Injector

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The cold start injector is mounted in the intake air stream. Controlled by the ECU, it provides additional fuel during cold engine start-up. Its function is controlled by both a timer circuit and as a function of coolant temperature. The 5S-FE and 1MZ-FE engines are not equipped with a cold start injector.

REMOVAL & INSTALLATION



See Figure 1



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Fig. Fig. 1: Cold start injector mounting location and hose attachment-3S-FE engine

  1. With the ignition OFF , disconnect the negative battery cable. For vehicles equipped with airbag systems, wait at least 90 seconds after disconnecting the battery before commencing any other work.
  2.  
  3. Disconnect the electrical harness from the cold start injector.
  4.  
  5. Place a container or towel under the cold start injector.
  6.  
  7. Slowly loosen the union bolt; contain fuel spillage. Remove the bolt and washers. Plug the fuel line immediately to prevent spillage and entry of dirt.
  8.  
  9. Remove the bolts holding the injector; remove the injector and gasket.
  10.  

To install:
  1. Using a new gasket, install the cold start injector. Tighten the bolts to 52-70 inch lbs. (6-8 Nm)
  2.  
  3. Install the fuel line with new gaskets. Tighten the union bolt to 11-15 ft. lbs. (15-20 Nm).
  4.  

The gaskets at the fuel fitting must be replaced every time the joint is loosened or disassembled.

  1. Connect the cold start injector harness.
  2.  
  3. Reinstall the throttle body if it was removed.
  4.  
  5. Connect the negative battery cable.
  6.  

TESTING



  1. Switch the ignition OFF .
  2.  
  3. Disconnect the electrical wiring from the cold start injector
  4.  
  5. Use an ohmmeter to check the resistance of the injector. Correct resistance is 2-4 ohms at 68°F (20°C). The resistance may vary slightly with the temperature of the injector. Use common sense and good judgment when testing.
  6.  
  7. If the resistance is not within specifications, it must be replaced.
  8.  
  9. Reconnect the wiring harness to the injector.
  10.  

 
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