Seville V8-273 4.5L (1989)
Grounding Point: All Technical Service Bulletins
Engine - Intermittent Driveability Concerns
INTERMITTENT DRIVEABILITY
CONDITIONS - REPAIR GROUND CONN.
# T-92-76
MODELS AFFECTED:
1988-1990 DE VILLES, FLEETWOODS, ELDORADOS, AND SEVILLES
Some 1988-1990 De Villes, Fleetwoods, Eldorados, or Sevilles may expenence one or more of the following driveability symptoms:
Engine Miss at Idle with High Electrical Load or A/C Load, Erratic Secondary Scope Patterns, Intermittent Backfires, Intermittent Loss of Power, Black
Smoke/Rotten Egg Odor From Tail Pipe, Detonation, Dieseling Intermittent No Start, Poor Fuel Economy.
These conditions may be caused by a poor engine ground. This results in erratic EST operation as commanded by the ECM.
To service this condition it is important to remove and clean the ground stud by the starter. Install a star washer, P/N 11501869, on both sides of the stud
to engine block. For location on De Villes and Fleetwoods refer to Figure 1; for Eldorados and Sevilles refer to Figure 2.
