Ford Corsar Repair Manual page 301

TROUBLE DIAGNOSES
Diagnostic Procedure 3
-
Unstable Idle (~ont'd)
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CHECK E.C.U. HARNESS CONNECTOR.
Repair or replace.
Check the E.C.U. pin terminals for dam-
age or poor connection of E.C.U. har-
ness connector.
.
.
TRY A KNOWN GOOD E.C.U.
l
.
.
INSPECTION END
l i ]
Check for IAS clogging or
throttle valve clogging.
CHECK IDLE ADJ. SCREW CLOGGING.
1. Perform "AAC VALVE ADJ"
No
@
in "WORK SUPPORTs' mode.
2. Can you set engine rpm as
follows by turning idle adjust-
ing screw?
MIT: 850 f 50 rpm
AIT: 650 f 50 rpm
("NW position)
OR
@
1. Disconnect throttle sensor har-
ness connector.
2. Can you set engine rpm as fol-
lows by turning idle adjusting
screw?
MIT: 650 f 50 rpm
AIT: 650 f 50 rpm
("N" position)
Check pistons, piston
rings, valves, valve seats
and cylinder head gas-
kets.
CHECK COMPRESSION PRESSURE.
Check compression pressure.
Standard: kPa (kglcm2, psi)lrpm
1,206 (12.3, 175)1250
Minimum: kPa (kglcm2, ps1)lrpm
1,010 (10.3, 146)1250
Difference between each cylinder:
kPa (kglcm2, psi)lrpm
98 (1.0, 14)1250
.
.
5