Engine - Miss Above 3500 RPM's
90pontiac19Bulletin Number: 90-6-41
Reference Number: 006105
Publish Date: 9/90
Subject: ENGINE MISS ABOVE 3500 RPM'S ON VEHICLES EQUIP. W/3800 V6 ENGINE (REPLACE CAMSHAFT)
Models
Affected: 1989-90 BONNEVILLE MODELS
An engine miss above 3500 rpm's, often without an accompanying valve train noise, could be caused by a broken camshaft lobe. If normal diagnostics fail to pinpoint the source of the miss, and the miss is isolated to the number 2 cylinder, inspect the 4th lobe back from the front of the camshaft for being broken.