Ford Corsar Repair Manual page 281

TROUBLE DIAGNOSES
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How to Perform Trouble Diagnoses for Quick and Accurate Repair (Cont'd)
INTERMITTENT PROBLEM SIMULATION
In order to duplicate an intermittent problem, it is effective to
create similar conditions for component parts, under which the
problem might occur.
Perform the activity listed under
Service procedure and note the
result.
Service procedure
Remove vacuum hose and apply vacuum.
Remove vacuum hose and apply pressure.
Rotate distributor clockwise.
Rotate distributor counterclockwise.
Disconnect exhaust gas sensor harness
connector.
Perform self-diagnosis (Mode
IIJI)
at 2,000
rpm.'
Turn idle adjusting screw counterclockwise.
Turn idle adjusting screw clockwise.
Tap or wiggle.
Race engine rapidly. See if the torque reac-
tion of the engine unit causes electric
breaks.
Cool with an icing spray or similar device.
Target condition
Made lean
Made rich
Advanced
Retarded
Suspended
Operation check
Raised
Lowered
Poor electric Connec-
tion or faulty widng
Cooled
1
2
4
6
7
8
9
Variable factor
Mixture ratio
Ignition timing
Mixture ratio feed-
back control
Idle speed
Electric connection
(Electric continuity)
Influential part
Pressure regulator
Distributor
Exhaust gas sensor
Control unit
I.A.A. unit
Harness Connectors
and wires
Temperature
Moisture
Electric loads
Ignition spark
Control unit
Electric parts
Load switches
Timing light
Warmed
Damp
Loaded
Spark power check
Heat with a hair drier.
[WARNING: Do not overheat the unit.]
Wet.
[WARNING: Do not directly pour water on
components. Use a mist
sprayer.]
Turn on headlights, air conditioner, rear
defogger, etc.
Try to flash timing light for each cylinder.