780 V6-2849cc 2.8L SOHC B280F (1987)
If idle speed is incorrect, see IDLE SPEED for more adjustment procedures.
Fig. 399 CHECK TIMING
11.
Check ignition setting at idle speed.
Reading should be:
16° ±2
Timing can only be checked, no adjustments are possible.
Fig. 342 CHECK AND ADJUST CO
12.
Check CO content. Test diode should blink if CO content is correct.
13.
If test diode remains on, the CO content is to high.
14.
If test diode remains off, the CO content is to low.
Fig. 370 REMOVE CO ADJUSTMENT SEAL
15.
To adjust CO, turn off engine.
16.
Drill two 2 mm (0.08 in.) holes into the plug.