Mitsubishi Eclipse 1990 Service Manual page 279

On-vehicle
Run the engine.
8. Set
7. Check the CO contents and the HC contents at idle.
Standard value:
CO contents: 0.5% or less
HC contents: 100 ppm or less
8. the standard value is exceeded, check the following
items:
Diagnostic output
Closed-loop control (When the closed-loop control
is carried out normally, the output signal of the
oxygen sensor
Injector
Ignition coil, spark plug
Evaporative emission
Compression
NOTE
Replace the three-way
HC contents do not
(even though the
all items.)
1. Before inspection, check that the engine oil, starter and
battery are normal. Also, set the vehicle to the following
condition:
Engine coolant temperature:
Lights, electric cooling fan and all accessories: OFF
Transaxle: Neutral (P range on vehicles with
2. Disconnect the spark plug cables.
3. Remove all of the spark plugs.
4. Disconnect the crankshaft position sensor
NOTE
Doing this will prevent the engine control unit from carrying
out ignition and fuel injection.
TSB Revision
CO, HC tester.
at idle.)
system the
,
of the"
PRESSURE CHECK
heated
and
,
CO and
the value.
on