Van Wagon 2WD L4-2237cc 2.2L (4Y-E) (1989)
Throttle Body: Testing and Inspection
ON VEHICLE CHECK:
1. Check that the throttle linkage moves smoothly.
Checking The Throttle Linkage
2. Check the vacuum at each port:
a. Start the engine
b. Check the vacuum with your finger
Checking The Throttle Body Vacuum Operation
c. Refer to the table for proper operation
Throttle Body Vacuum Table
d. If a problem is found, proceed to INSPECTION OF THROTTLE BODY in this article.
INSPECTION OF THROTTLE BODY (OFF VEHICLE):
1. Remove Throttle Body from engine. Refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES for proper procedure.
2. Using a soft brush and carburetor cleaner, clean the cast parts of the Throttle Body.
CAUTION: Do not allow carburetor cleaner to come in contact with the TPS, as damage will result.
3. Using compressed air, clean all passages and openings.