NOTE: edited for readability
1988 Pontiac Fiero L4-151 2.5L
PROM - Multiple Driveability Concerns
Bulletin Number: 89-6-65 Reference Number:
Publish Date: 936516R 8/89
Subject: MULTIPLE DRIVEABILITY CONCERNS, FOR 2.5L ENGINE (INSTALLATION OF NEW PROM)
Models
Affected: 1987-89 6000, GRAND AM AND FIERO
This bulletin contains new and revised calibrations to address additional driveability conditions.
Some 1987-89 6000 and Grand Am and 1987-88 Fiero models may exhibit one or more of the following driveability conditions:
1. Hard Hot Engine Restart
2. Intermittent Higher Than "Normal" Idle
3. Spark Knock (Detonation)
4. Code 42
If these conditions cannot be addressed through normal service procedures, they may be repaired by installing the appropriate hardware as outlined below.
SERVICE PROCEDURE:
1) Use a scanner to determine the PROM I.D. that is currently in the vehicle.
2) Look for that PROM I.D. in Table 1 or Table 2 as indicated below, and select the corresponding required parts:
If the major condition is hard hot engine restart, use Table 1.
If hard hot engine restart is not the major problem, but the condition is intermittent high idle (similar to cold fast idle), spark knock, and/or Code 42, use Table 2.
3) Install the new parts and verify that the driveability conditions have been corrected.
Pontiac Table 1 -- TABLE 1 (SNIPPED)
Pontiac Table 2 -- Table 2 (see next post!)
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[This message has been edited by nick2x88 (edited 11-11-2003).]
