Thunderbird V6-232 3.8L SC (1989)
Idle Speed Control Bypass Air (ISC-BPA) Valve: All Technical Service Bulletins
Air By Pass Valve - Cleaning/Replacement Service Tips
FUEL SYSTEM-3.8L EFI-AIR BY-PASS VALVECLEANING AND REPLACEMENT SERVICE TIPS
Article No. 89-13-8
FORD:
1989 TAURUS, THUNDERBIRD
LINCOLN-MERCURY: 1989 CONTINENTAL, COUGAR, SABLE
ISSUE:
Two different types of air by-pass valves have been released for use on 3.8L EFI engines. One type of valve has a silver metal housing and
the other type has a black plastic housing. Both of the valves function in the same manner. Air by-pass valves that have a black plastic
housing cannot be cleaned, they must be replaced. Valves that have silver metal housings can be cleaned.
ACTION:
If cleaning or replacement of an air by-pass valve is required, refer to the following supplemental service information. Also refer to the
appropriate Car Shop Manual, Section 24-11 for service details.
Figure 1
Figure 2
