Circuit Description
Refer to
Fuel Injectors
for an electrical diagram of this circuit.
The Fuel Injector Balance Test compares the performance of each of the cylinder by using the PCM to shut off fuel injection. This measures the performance of each cylinder by the amount of RPM drop caused by that cylinder not producing a power stroke. If proper fuel delivery has been determined, then a cylinder that does not show good performance (RPM drop) indicates either an ignition or mechanical problem.
Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check | |
2 | Has the Fuel System Check been performed? | -- | Go to Fuel System Diagnosis (Fuel System Check) | |
Were engine speed and idle quality changes for all cylinders equal? | -- | Go to EVAP Control System Diagnosis | Go to Electronic Ignition (EI) System Diagnosis (Ignition System Check) |
