Operation CHARM: Car repair manuals for everyone.

System Specifications

Air Fuel Mixture
CO content [1] between 0.2 & 8 %

Firing Order 1-8-7-3-6-5-4-2

Idle Speed
With engine fully warm 650 ± 50 rpm

Ignition Timing
At 650 rpm 15° ± 2° BTDC

Spark Plug Gap [3] 0.039 - 0.043in (1.0 - 1.1mm)

Valve Adjustment Hydraulic


[1] With 2.5 K ohm resistor in place of engine temperature
sensor and with O2 sensor disconnected.
[2] Automatic transmission in neutral.
[3] Platinum spark plugs