780 V6-2849cc 2.8L SOHC B280F (1987)
Idle Speed: Adjustments
Fig. 390 REMOVING COMPONENTS
NOTE: The idle speed is controlled by an electronic control unit (ECU). Do not adjust idle speed, unless it is out of specified tolerance (750 ± 50
RPM in P).
1.
Remove the following to adjust idle speed:
Air control valve and crankcase ventilation hoses (1) from air intake hose (3).
Air mass meter connector (6).
Tie band (4) around air intake hose.
Air intake hose (3).
Tie band (8) around cable harness and fuel distributor pipe.
Ignition cable (5) from cyl. 1 spark plug.
Connector for cyl. 1 injector (2) and left side knock sensor (7).
Move cable harness to one side.
Fig. 391 ADJUSTING TROTTLE
2.
Remove link rod from throttle drum and loosen adjustment screw locking nut (A).
3.
Turn adjusting screw counter clockwise until butterfly is completely closed. Unscrew adjusting screw until it just touches link arm, Then a further
1/4 to 1/2 a turn. Tighten locking nut.