HESITATION/RUNS ROUGH-START/ STALL COLD(NEW CALIBRATION)

Subject: HESITATION/RUNS ROUGH OR START/STALL COLD

Model and Year: 1992-93 CAVALIER, CORSICA AND BERETTA WITH 2.2L ENGINE AND MANUAL TRANSMISSION

CONDITION:

--------- Some owners of 1992-93 J or L cars with the 2.2L (LN2, VIN 4) engine and manual transmission may comment of a cold weather start/stall, stall on initial clutch engagement, or running rough cold.

CAUSE:

----- Low volatility fuel that does not fully vaporize in a cold engine.

CORRECTION:

---------- New calibrations have been released which compensate for the low volatility fuel during cold weather. Install the correct calibration based on the chart below and recommend that the owner use low octane fuel (87 or equivalent).

Calibrations are available starting with the April, 1993 CD update.

CALIBRATION APPLICATIONS

BODY TRANS EMISS PART BRDCST SCANNER TYPE TYPE TYPE NO. TYPE I.D. ---- ----- ----- ---- ------ ------- J Manual Federal 16191791 BFKU 1791 J Manual California 16191801 BFKW 1801 L Manual Federal 16191821 BFKY 1821 L Manual California 16191811 BFKX 1811

WARRANTY INFORMATION:

Labor Operation: T0500

Labor Time: 0.3 Hour

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.