GM > Engine > General
Engine Size
- Number of Cylinders: Number of cylinders. We recommend not changing this.
- Cylinder Volume: Volume of one cylinder in Liters.
- Engine Type: Engine Identifier. We recommend not changing this.
Exhaust Gas Recirculation (EGR)
- EGR Enabled: Enables/disables EGR system routines.
- EGR min IAT: Inlet Air Temp above which EGR is enabled.
- EGR min ECT: ECT must be above this to enable EGR.
- EGR max ECT: ECT must be below this to enable EGR.
- EGR Diagnostic Disable Speed: Speed at which EGR is disabled.
- EGR Diagnostic Enable Speed: Speed at which EGR is enabled.
- EGR Maximum vs. Fuel Qty vs. RPM: The Maximum EGR opening percentage.
- EGR Minimum vs. Fuel Qty vs. RPM: The Minimum EGR opening percentage.
- EGR Max RPM: RPM above which EGR is enabled.
- EGR Cutoff Position: Below this desired position, EGR is disabled.
Exhaust Brake
- Exhaust Brake Max RPM: The highest allowed engine speed for exhaust brake operation.
Air Pump
- Air Pump Disable Coolant Temp: Temperature to disable the air pump
Shift Light
- Master Enable: Enables/Disables the shift light routines. Do NOT enable these routines on A4 vehicles.
- PCM Lamp Output: Enables/Disables PCM wired lamp output.
- High RPM: Shift Light will light above this RPM.
- Min ECT: Minimum engine coolant temperature to enable shift.
- Max On Time: Maximum time the shift light will remain lit.
- Low ECT Select: Below this engine temperature use the "RPM vs. Gear - Low ECT" table. Used to indicate shifts when engine is cold.
- Min Clutch Out Time: Inhibits shift light for this time after clutch is released.
- Gear Ratios: Ratio's that define each gear for RPM select tables.
- Delay Time: Delay between shift point reached and light being illuminated.
- Min MAP vs. Gear: Shift light is turned off when MAP is below this threshold.
- RPM vs. Gear: Lowest engine speed to allow shift light to be illuminated in each gear.
- RPM vs. Gear - Low ECT: Lowest engine speed to allow shift light to be illuminated in each gear when engine cold.
- Min TPS% vs. Gear: Lowest throttle position to allow shift light to be illuminated in each gear.
- Max TPS% vs. RPM vs. Gear: Highest throttle position to allow shift light to be illuminated in each gear and RPM.
- Max TPS% Hysteresis vs. Gear: Hysteresis subtracted from "Max TPS% vs. RPM vs. Gear" when shift light is off.
- Max TPS% Multiplier vs. BARO: Multiplier applied to "Max TPS% vs. RPM vs. Gear" for barometric correction.
Tach Output
- Tach Type: The type of tachometer system fitted.
- Tach Output Resolutions - High: Number of periods the tach output remains high.
- Tach Output Resolutions - Low: Number of periods the tach output remains low.
Variable Camshaft
- VCP Base Angle vs. Fuel Trim Cell: This table defines the base cam position in relation to fuel trim cell.
- VCP PE Base vs. RPM: This table defines the base cam position in relation to RPM when in PE mode.
- VCP PE Modifier vs. RPM: This table modifies (adds to) the cam angle for PE mode.
- VCP PE Modifier Mult vs. MAP: This table multiplies the PE Modifier cam angle in PE mode.
- VCP Angle Mult vs. ECT: This table multiplies the cam angle in relation to engine coolant temperature.
- VCP Angle Mult vs. Fuel Trim Cell vs. Baro: This table multiplies the cam angle in relation to fuel trim cell and barometric pressure.
- VCP Retard vs. Knock Learn: This table retards the cam position in relation to the knock learn factor (octane scalar).
Intake Camshaft Base Angle
- Intake Cam Angle - Warm: Desired camshaft angle when the engine is warm.
- Intake Cam Angle - Cold: Desired camshaft angle when the engine is cold.
- Intake Cam Angle Idle - Warm: Desired camshaft angle when the engine is warm and idle conditions.
- Intake Cam Angle Idle - Cold: Desired camshaft angle when the engine is cold and idle conditions.
- Intake Cam Angle - Warmup Factor: Warmup factor. A value of 1.0 means use the warm table, a value of 0 means use the cold tables.
Knock Angle
- Intake Cam Angle - Knock: Desired camshaft angle when engine knock is detected.
- Intake Cam Angle - Knock Factor: Knock factor. A value of 1.0 means use the knock angle, a value of 0 means use the regular tables.
Catalyst Heating
- Intake Cam Angle - Catalyst Heating Warm: Desired camshaft angle when the engine is warm and catalyst heating is in progress.
- Intake Cam Angle - Catalyst Heating Cold: Desired camshaft angle when the engine is cold and catalyst heating is in progress.
- Intake Cam Angle Idle - Catalyst Heating Warm: Desired camshaft angle when the engine is warm and catalyst heating is in progress, idle Conditions.
- Intake Cam Angle Idle - Catalyst Heating Cold: Desired camshaft angle when the engine is cold and catalyst heating is in progress, idle Conditions.
- Intake Cam Angle - Catalyst Heating Factor: Catalyst heating factor. A value of 1.0 means use the knock angle, a value of 0 means use the regular tables.
Exhaust Camshaft Base Angle
- Exhaust Cam Angle - Warm: Desired camshaft angle when the engine is warm.
- Exhaust Cam Angle - Cold: Desired camshaft angle when the engine is cold.
- Exhaust Cam Angle Idle - Warm: Desired camshaft angle when the engine is warm and idle conditions.
- Exhaust Cam Angle Idle - Cold: Desired camshaft angle when the engine is cold and idle conditions.
- Exhaust Cam Angle - Warmup Factor: Warmup factor. A value of 1.0 means use the warm table, a value of 0 means use the cold tables.
Knock Angle
- Exhaust Cam Angle - Knock: Desired camshaft angle when engine knock is detected.
- Exhaust Cam Angle - Knock Factor: Knock factor. A value of 1.0 means use the knock angle, a value of 0 means use the regular tables.
Catalyst Heating
- Exhaust Cam Angle - Catalyst Heating Warm: Desired camshaft angle when the engine is warm and catalyst heating is in progress.
- Exhaust Cam Angle - Catalyst Heating Cold: Desired camshaft angle when the engine is cold and catalyst heating is in progress.
- Exhaust Cam Angle Idle - Catalyst Heating Warm: Desired camshaft angle when the engine is warm and catalyst heating is in progress, idle Conditions.
- Exhaust Cam Angle Idle - Catalyst Heating Cold: Desired camshaft angle when the engine is cold and catalyst heating is in progress, idle Conditions.
- Exhaust Cam Angle - Catalyst Heating Factor: Catalyst heating factor. A value of 1.0 means use the knock angle, a value of 0 means use the regular tables.