Regal V6-231 3.8L Turbo VIN 8 4-bbl (1983)
Idle Speed Control Motor: Technical Service Bulletins
Idle Speed Control, ISC II - Revised Features
Model Year 1983
Bulletin No. 83-72
File In Group
64A
Number 9
Date Feb., 83
SUBJECT:
Revised Idle Speed Control, ISC II On Certain 1983 Dualjet and Quadrajet Carburetors
A revised Idle Speed Control Assembly was introduced on Dualjet carburetors for the 3.8L V-6 engine (VIN Code 9) in December of 1982. Use has
been extended to Quadrajet carburetors used on the 4.1L V-6 engine (VIN Code 4), and Dual jet carburetors used on the 3.0L V-6 engine (VIN Code E),
and 3.8L V-6 engine (VIN Code A). The new ISC assembly is identified by the numeral "II" on the motor housing, as shown.
The new feature is a silent throttle contact switch that does not "Click" when actuated. When checking operation of the throttle contact switch on ISC II,
follow present Service Manual procedures.
