All ECU’s use many sensors to find out load. However the strategy used may differ amongst engines given that the Silvertop employs a straightforward Vane type airflow meter while the Blacktop employs a more intricate vacuum (MAP) and throttle place (TPS) for larger throttle openings where there isn't a vacuum. https://jdmtoyota4a-ge83714.nizarblog.com/31497308/not-known-facts-about-4a-ge-engine-for-sale