Engine - Rough Idle Condition
Number 84-6(Gasoline)-93 Date 10/87Subject: L-4 CARBURETOR ROUGH IDLE (OR STALLING AT IDLE)
1982-84 2000 AND SUNBIRD MODELS EQUIPPED WITH 1.8L 4 CYL. ENGINE (VIN CODE G) OR 2.0L 4 CYL. ENGINE (VIN CODE B)
The above applications 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.
This bulletin is for information only.
Use applicable labor operation and time.