RPM
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Eu quero acreditar que sim, a Honda não brinca em serviço.
Num manual de reparação PGM-FI 1984-1995:
http://www.autozone.com/az/cds/en_us/0900823d/80/14/18/39/0900823d80141839/repairInfoPages.htm
Fuel cut-off takes place at a set position or angle of the throttle valve. If the throttle valve is moved to adjust idle speed, this position or angle will be changed and the system may not cut off fuel supply. To solve this problem, the throttle body contains an adjustable bypass circuit. This circuit is designed to control the amount of air bypassing into the intake manifold without changing the position of the throttle valve. While the idle control system is in operation, the idle screw has no effect on the idle speed.
Usually idle speed adjustment does not require turning the idle adjustment screw since idle speed is adjusted automatically by the operation of the idle control system. Idle speed does not change by turning the idle adjust screw while the idle control system is in operation.
http://www.autozone.com/az/cds/en_us/0900823d/80/14/18/39/0900823d80141839/repairInfoPages.htm