S10/T10 Blazer 2WD L4-121 2.0L VIN Y 2-bbl (1983)
Throttle Body Gasket: Technical Service Bulletins
Engine - Rough Idle or Stalling at Idle
Number:
88-154
Section:
6E
Date:
OCT., 1987
Subject:
ROUGH IDLE OR STALLING AT IDLE
Model and Year: 1982 CAVALIER 1.8L (VIN G) ENGINE
1983 S/T TRUCK 2.0L (VIN Y) ENGINE
TO:
ALL CHEVROLET DEALERS
The vehicles and engine combinations indicated above may experience a rough idle condition (at idle or off-idle) that is generated by a lean mixture.
Normal service manual diagnostic procedure should be followed to isolate the cause of the lean mixture.
The EFE isolator/gasket below the carburetor should be checked for vacuum leakage, contributing to the lean condition. If the EFE isolator/gasket is
identified as the vacuum leak source, then the isolator/gasket should be replaced per service manual procedure.
The EFE isolator/gasket (P/N 14018761) is available from GMSPO on their "Target Program" and is covered by GM's 5 yr/50,000 mile emission
warranty.
Use applicable labor operation and time.
