Engine - Miss, Backfire, Hard Start, or Rough Idle

90buick15

Builetin 90-6E-20


Date Dec. '90


Ref. No. 90-2


Corp. Ref. No. 076404

SUBJECT: ENGINE MISS, BACKFIRE, HARD START, ROUGH IDLE OR CHUGGLE (INSTALL NEW IGNITION COILS)


MODELS AFFECTED: 1988-90 SKYLARK MODELS (BELOW VIN LM066531) 2.3L QUAD 4 (VIN D)

CONDITION:


Some 1988-90 Skylark models equipped with 2.3L (VIN Code D) may exhibit an engine miss, backfire, hard start, rough idle or chuggle. These conditions may be caused by the ignition coil. If 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. VIN breakpoints start with LM066531.

CORRECTION:


Replace BOTH coils with package P/N 10457062. This package will contain 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