ENGINE MISS, BACKFIRE, HARD TO START & ROUGH/CHUGGLE. Chevrolet Beretta 1990

For 1990-2009 cars

# ENGINE MISS, BACKFIRE, HARD TO START & ROUGH/CHUGGLE

#### Subject: ENGINE MISS, BACKFIRE, HARD START, ROUGH IDLE OR CHUGGLE

#### Model and Year: 1990 BERETTA GTZ (ONLY) WITH 2.3L ENGINE

#### CONDITION:

Some 1990 Beretta GTZ models equipped with 2.3L (VIN Code A) may exhibit engine miss, backfire, hard start, rough idle or chuggle. These conditions may be caused by the ignition coil it diagnosis leads to the ignition coil it will be necessary to replace both. The new type coils have a revised electrical connection tab that is yellow in color to aid in identification. The internal metal pins were also revised for improved durability. These coils went into May 1990 vehicle production. Following is the VIN breakpoint for the vehicles involved.

RPO/VIN CARLINE 1990

LGO/A L SOP to LY227076 (NA5)

#### CORRECTION:

Replace BOTH coils with package P/N 10457062. This package contains two coils.

Parts are currently available from GMSPO.

#### WARRANTY INFORMATION:

Labor Operation Number: T4676 Labor Hours: 0.7 hour (Includes diagnostic time.) Trouble Code: 92

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.