Chrysler Full-Size Trucks 1997-2000 Repair Guide

Fuel Injectors

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REMOVAL & INSTALLATION



  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner assembly.
  4.  
  5. Remove the fuel rail assembly.
  6.  
  7. Remove the clip(s) retaining the injector(s) to the rail.
  8.  
  9. Remove the injector(s) from the fuel rail.
  10.  

To install:

  1. Apply a small amount of engine oil to each injector O-ring.
  2.  
  3. Install the injector(s) onto the fuel rail and install the clip(s).
  4.  
  5. Install the fuel rail assembly.
  6.  
  7. Install the air cleaner assembly.
  8.  
  9. Connect the negative battery cable.
  10.  
  11. Start the engine and check for leaks.
  12.  



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Fig. The injectors are fastened to the fuel rail by clips



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Fig. Check condition of the injector O-rings (arrow). Apply a drop of clean engine oil before installation



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Fig. Use a suitable tool to remove O-rings from the injector

TESTING



A scan tool is the recommended method of troubleshooting injector-related problems, but the following tests can provide useful information in many applications.

  1. With the engine running, disconnect a wire of each injector, in turn. If no change in running condition is observed when one of the injectors is disconnected, the problem has been isolated to that cylinder.
  2.  
  3. Check the resistance across the injector terminals. It should be about 12 ohms. If open or shorted, replace the injector.
  4.  
  5. After removing an injector, apply 12 volts DC across the terminals. A "click" should be heard. If not, replace the injector.
  6.  


WARNING
Do NOT leave the injector connected to voltage for more than a couple a seconds. To do so will destroy the unit.

 
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