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1998 Cadillac Seville SLS 4.6L Poor Idle Quality, Misfire
Posted to GM Driveability on 9/28/2006 12 Replies

Has misfire when cold in mostly cylinder 1 when cold. When engine warms up in (closed loop) the mis-fire goes away and runs clean. Ignition checks out with no codes///date stream looks good except for LTFT....Smoke tested and found leak at rear of intake close...

12 Replies Received (View Replies)

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Message Closed w/FIX

car Vehicle Data

1998 Cadillac Seville SLS

VIN 1G6KS54Y8W
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursCold
Message Closed w/FIX

car Vehicle Data

1998 Cadillac Seville SLS

VIN 1G6KS54Y8W
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursCold