Service manual

IGNITION SYSTEM SERVICE MANUAL NUMBER 26
Page 4B-4 90-861329--1 MARCH 1999
Specifications
Timing
Timing (At Idle rpm)
1
1° BTDC
2
/ 1° ATDC
3
/ 2° ATDC
4
1
Timing must be set using a special procedure as outlined in this section. Timing cannot be properly set using
the conventional method.
2
Serial number break: 0L096999 and below
3
Serial number break: 0L097000 - 0L0340999
4
Serial number break: 0L341000 and above.
Spark Plugs
Spark Plug Gap .035 In. (0.9 mm)
3.0L
AC-MR43LTS
NGK-BPR6EFS
Champion RS12YC
GM 4-Cylinder In-line Firing
50683
Firing Order 1-3-4-2
Index