Air By Pass Valve - Cleaning/Replacement Service Tips

89Ford21

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:

Figure 3:

1. Do not clean the black plastic air by-pass valve, Figure 1. This valve cannot be cleaned with carburetor cleaner because it can damage the valve's internal components.

CAUTION: IF THE BLACK PLASTIC AIR BY-PASS VALVE REQUIRES SERVICE, IT MUST BE REPLACED.

2. The silver metal air by-pass valve can be cleaned. Use carburetor cleaner (D9AZ-19579-BA) to clean it.

3. Mount the black plastic air by-pass valve with the electrical connector on the in-board side of the throttle body, Figure 3. Do NOT mount it on the rocker cover side of the throttle body.

4. Reinstall the silver metal air by-pass valve in the same position as it was originally installed.

PART NUMBER PART NAME CLASS

D9AZ-19579-BA Carburetor Cleaner - Pkg. of 12 B
E9SZ-9F715-E Air By-Pass Valve - Black B

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 4600