Wagoneer L6-258 4.2L VIN C 2-bbl (1982)
Idle Speed: By Symptom
Technical Service Bulletin # 14E458
Date: 871101
Engine - Idle Speed Low/Inconsistent
14E458
NOVEMBER 1987
1981-87 GRAND WAGONEER/ TRUCK VEHICLES WITH 4.2L ENGINE
ENGINE
Attention: Workshop, Parts Department
THIS I.S. NOTE HAS BEEN REVISED AS INDICATED BY THE REVISION BARS:
IDLE SPEED
The idle speed may be low, or inconsistent on some 1981-87 Grand Wagoneer/Truck vehicles equipped with a 4.2L engine. If this condition exists, the
following items must be adjusted to obtain proper engine operation.
^
IGNITION TIMING
^
CURB IDLE SPEED
^
FAST IDLE SPEED
^
SOLE-VAC THROTTLE POSITIONER
Refer to the adjustment procedures listed below.
ADJUSTMENT PROCEDURES
The engine must be at normal operating temperature and all electrical accessory switches in the OFF position.
Ignition Timing
1.
Remove the air filter assembly.
2.
Set the parking brake. Shift automatic transmissions to PARK and manual transmissions to the NEUTRAL position.
3.
With the ignition switch OFF, connect an ignition timing light to the number (1) spark plug and a tachometer to the coil negative terminal (A).
