Test Description

The numbers below refer to step numbers in diagnostic procedure.

1. 3
   
   Fuel pressure should be within specified range. If fuel pressure is not within specified range, see FUEL SYSTEM DIAGNOSIS (BI-FUEL & CNG) .
2. 5
   
   If pressure drop value for each fuel injector is within 2 psi (14 kPa) of average pressure drop value, fuel injectors are flowing properly. Calculate pressure drop value for each fuel injector by subtracting second pressure reading from first pressure reading.