Mitsubishi LANCER EVOLUTION-IV 1998, Workshop Manual, Page: 193 / 526

ENGINE –
Engine Adjustments
11-7
4. LASH ADJUSTER REPLACEMENT
Refer to (4) of the preceding paragraph.
5. IGNITION TIMING CHECK
Check that ignition timing is at the standard value.
Standard value: approx. 5
_
BTDC
NOTE
Ignition timing is variable within about
±
7
_
, even under normal
operating.
6. IDLE SPEED CHECK AND IDLE MIXTURE
CHECK
(1) Run the engine at 2,000 to 3,000 r/min for 2 minutes.
(2) Check the CO and HC contents at idle.
Standard value
CO contents: 0.6% or less
HC contents: 300 ppm or less
7. COMPRESSION PRESSURE CHECK
(1) Before inspection, check that the engine oil, starter and
battery are normal. In addition, set the vehicle to the
pre-inspection condition.
(2) Remove all of the spark plugs.
(3) Disconnect the crank angle sensor connector.
NOTE
Doing this will prevent the engine-ECU from carrying out
ignition and fuel injection.
(4) Cover the spark plug hole with a shop towel etc., and
after the engine has been cranked, check that no foreign
material is adhering to the shop towel.
Caution
(1) Keep away from the spark plug hole when
cranking.
(2) If compression is measured with water, oil, fuel,
etc., that has come from cracks inside the cylinder,
these materials will become heated and will gush
out from the spark plug hole, which is dangerous.
Crank angle
sensor connector