Engine Controls - System & Component Testing - 6.0L W/bifuel & Cng: Overview Chevrolet Silverado 1500 HD

Test Description

The number below refers to step number in diagnostic procedure.

1. 3 - The fuel pressure should be within the specified range. See «FUEL SYSTEM PRESSURE TEST»(ref-153237-S04977551782003032600000) .
2. 5 - If the pressure drop value for each fuel injector is within 2.0 psi (14 kPa) of the average pressure drop value, the fuel injectors are flowing properly. Calculate pressure drop value for each fuel injector by subtracting the second pressure reading from the first pressure reading.

The number below refers to step number in diagnostic procedure.

1. 3 - This step tests each fuel injector resistance within a specific temperature range. If any of the fuel injectors display a resistance outside of the specified value, replace the fuel injector.
2. 4 - This step determines if all of the fuel injectors are within 0.5 ohm of each other. If the highest resistance value is within 0.5 ohm of the lowest resistance value, then all of the fuel injector coil windings are okay.
3. 5 - This step determines which fuel injector is faulty. After subtracting the highest and lowest resistance values from the average value, replace the fuel injector that has the greatest resistance difference from the average.