780 V6-2849cc 2.8L SOHC B280F (1987)
Idle/Throttle Speed Control Unit: Technical Service Bulletins
CIS Valve - Checking Procedures
SECTION
GROUP
NO.
23
710
DATE
FEBRUARY 1990
RE:
CONSTANT IDLE STABILIZER - (CIS) VALVE B23FT - LH 2.1 B230F/FT - LH 2.2 ONLY B280F
THIS BULLETIN APPLIES TO THE U.S. AND CANADA
REFERENCE:
TP 30684/1 (ENGLISH); B23FT - ENGINE TP 31140/1 (ENGLISH); B230F - ENGINE TP 30987/1 (ENGLISH); B230FT -
ENGINE TP 31451/1 (ENGLISH); B230FT - LH-JETRONIC 2.2 SYSTEM TP 31113/1 (ENGLISH); B280F - LH-JETRONIC 2.2
SYSTEM
X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
Checking the constant idle stabilizer valve
CIS valves must be checked carefully to prevent unnecessary replacement. Use the following procedures to determine if a fault actually exists.
Check the following:
-
throttle plate position and opening
-
throttle switch adjustment
-
temperature sensor operation
998-8190
999-9921
mono-tester
Connect test instrument 8190 and 9921
Turn ignition OFF. Remove right underdash panel and kick panel.
Release catch and fold down connector. Connect 8190 between control unit and connector using adapter 8191 as shown.