The ______ must be correct because fuel and spark tables use calculated load as a primary input.

The ______ must be correct because fuel and spark tables use calculated load as a primary input.

• A. Engine Load
• B. Air Density
• C. Fuel Pressure
• D. Spark Plug Type

Answer: (A)

Engine load must be correct because those fuel and spark maps are indexed by load (often with RPM as the other axis). The engine control unit uses the calculated load to pick the precise cell in the table, determining how much fuel to inject and how far to advance or retard timing. If the load estimate is off, the ECU selects the wrong cell, causing fueling and ignition to be inappropriate for the actual engine demand. Air density contributes to calculating load but isn’t itself the primary lookup input, while fuel pressure and spark plug type are hardware factors that don’t drive the table values directly.

Engine load must be correct because those fuel and spark maps are indexed by load (often with RPM as the other axis). The engine control unit uses the calculated load to pick the precise cell in the table, determining how much fuel to inject and how far to advance or retard timing. If the load estimate is off, the ECU selects the wrong cell, causing fueling and ignition to be inappropriate for the actual engine demand. Air density contributes to calculating load but isn’t itself the primary lookup input, while fuel pressure and spark plug type are hardware factors that don’t drive the table values directly.