Post-Start Post-start-the 5-30 seconds when you want the engine to keep running after you release the key from CranK-is affected by engine temperature as well as a timer in the control unit. Colder engines get more fuel injected. Also colder engines get more timing advance. Based on the start up temperature, and the time since start, post-start enrichment is gradually reduced. The idle-speed stabilizer maintains rpm Warm-Up During warm up, the most important input, besides engine load and rpm for basic pulse time, is engine temperature. The control unit includes a rom map of warm-up characteristics to apply a correction factor based on load and engine speed greater at low loads and rpm than at high loads and rpms [3] ee Fig 4-4. Control unit outputs include injection pulses for the proper mixture, ignition timing for driveability(advance under part-load acceleration, retard on deceleration to reduce HC emissions), and idle stabilization to help keep the engine running at idlePost-Start Post-start-the 5-30 seconds when you want the engine to keep running after you release the key from CRANK-is affected by engine temperature as well as a timer in the control unit. Colder engines get more fuel injected. Also, colder engines get more timing advance. Based on the start￾up temperature, and the time since start, post-start enrichment is gradually reduced. The idle-speed stabilizer maintains rpm. Warm-Up During warm up, the most important input, besides engine load and rpm for basic pulse time, is engine temperature. The control unit includes a ROM map of warm-up characteristics to apply a correction factor based on load and engine speed, greater at low loads and rpm than at high loads and rpms [3], See Fig.4-4. Control unit outputs include injection pulses for the proper mixture, ignition timing for driveability (advance under part-load acceleration, retard on deceleration to reduce HC emissions), and idle stabilization to help keep the engine running at idle