Special VCM Controls
Cylinder Balance: The cylinder balance test calculates % of efficiency using current RPM. RPM is gauged with all injectors running normally. Injectors are then cut 1 cylinder at a time and the new RPM is compared to the pre-test RPM to determine % of efficiency. To use this test the main scanner must be stopped. You must also control the IAC steps as well for consistency.
Cylinder Balance Test - How-To
Bring the engine up to full operating temp (at least 180*)
Open the Scanner
Sectect VCM Controls and then Special
The scanner need to be connected but stopped and no log file opened.
Set the IAC to around 800 to 900 RPMs
Set the IAC steps to 60
Click Begin
Idle (IAC) Control RPM: Force a desired idle RPM.
Idle (IAC) Control Steps: Force the IAC motor to this position. This control is also used for the cylinder balance test.
CASE Learn: To use the CASE learn function please follow these steps:
Put the vehicle into park (auto) or neutral (manual).
Turn off all accessories and A/C.
Apply the parking brake.
Press the brake pedal. Keep the brake pedal depressed during the entire procedure.
Press Begin.
Gradually rev the vehicle to fuel cutoff (around 4000-5000 RPM's) over a period of about 4 seconds. When fuel cuts out, immediately release the throttle.
Allow the engine to come back to an idle.
Turn the ignition off for at least 15 seconds. This step is required for the VCM to store the newly learned configuration.
