Throttle Body - Stalling/Rough or Rolling Idle
Bulletin No.: 022/96Issued: 09/09/96
Revised:
Category
F
Applicable Model/s
1993 - 96 626/MX-6
Subject:
THROTTLE BODY SERVICE PROCEDURE FOR CARBON REMOVAL
APPLICABLE MODELS
1993 - 96 626/MX-6
DESCRIPTION
Carbon deposits on the throttle body bore / throttle valve may cause one or more of the symptoms shown.
Customers complaining of these symptoms should have the vehicle inspected and carbon removed according to the instructions in this bulletin. DO NOT REPLACE THE THROTTLE BODY TO CORRECT THIS CONCERN.
MATERIALS REQUIRED
REPAIR PROCEDURE
1. Verify the concern.
2. Remove the throttle body. Refer to section F of the workshop manual.
NOTE:
DO NOT remove the IAC Valve (V6), ISC Valve (4cyl) or the TPS.
3. Thoroughly clean around the IAC Valve (V6), ISC Valve (4cyl) and the Air Adjust Screw ports in the bore of the throttle body. Use a clean shop towel for cleaning.
3. Apply masking tape to fully cover the IAC Valve ("6), the ISC Valve (4cyl) and the Air Adjust Screw ports in bore of the throttle body. Refer to Fig. 1
NOTE:
The masking tape is applied to prevent cleaner from entering these ports.
4. Looking at the back of the throttle body, cover the IAC Valve (V6), ISC Valve (4cyl) and the Air Adjust Screw pons with masking tape. Refer to Fig. 1
WARNING:
SAFETY GLOVES AND SAFETY GLASSES MUST BE WORN WHILE WORKING WITH THIS SOLUTION.
5. Fill a small container (glass or cup) with Heritage S.W. 1000.
NOTE:
This solution must be used full strength.
6. Place a small plastic bucket or drain pan under the throttle body and slowly pour the container of solution through the throttle body bore. Refer to Fig. 2
7. Pour the solution in the bucket or drain pan back into the small container.
8. Repeat steps 6 and 7 (five to six times).
9. Allow the throttle body to Sit for 5 minutes.
CAUTION:
DO NOT immerse the throttle body or any electrical components in the solution.
10. Use a shop towel to wipe carbon deposits from the throttle body bore and throttle valve.
NOTE:
Remove all carbon deposits however, give special attention to the throttle valve to bore contact area.
11. Repeat steps 6 - 10 if necessary.
12. Blow the residue from the throttle body with compressed air.
13. Remove all masking tape.
14. Install a new gasket
15. Install the throttle body. Refer to section F of the workshop manual.
16. Start engine and run to normal operating temperature.
17. Inspect idle speed, adjust if necessary Refer to section F of the workshop manual.
18. Inspect timing, adjust if necessary. Refer to section F of the workshop manual.
19. Verify repair effectiveness.
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