SPARK KNOCK/DETONATION MAY OCCUR WHILE CRUISING OR ACCELERATING AT HIGHWAY SPEEDS W/ AMBIENT TEMPS OF 70 DEGREES F (21 DEGREES C) OR HIGHER. THIS IS DUE TO TOO MUCH SPARK ADVANCE. REPLACE THE POWERTRAIN CONTROL MODULE (PCM) W/ A REVISED PCM.
SPARK KNOCK/DETONATION MAY OCCUR WHILE CRUISING OR ACCELERATING AT HIGHWAY SPEEDS W/ AMBIENT TEMPS OF 70 DEGREES F (21 DEGREES C) OR HIGHER. THIS IS DUE TO TOO MUCH SPARK ADVANCE. REPLACE THE POWERTRAIN CONTROL MODULE (PCM) W/ A REVISED PCM.