Engine - Hesitation, Runs Rough or Stalls When Cold

Number: 93-220-6E
Section: 6E
Date: MAY 1993
Corporate Bulletin No.: 376001
ASE No.: A1, A8

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.

WARRANTY INFORMATION:

Labor Operation: T0500
Labor Time: 0.3 Hour