Allante V8-273 4.5L (1991)
Engine Control Module: All Technical Service Bulletins
Engine - Intermittent Driveability
Bulletin No
T-93-32
File in Group
6E
Number
105
Corp. Ref. No
1216107R
Date
Nov. 1992
SUBJECT:
INTERMITTENT DRIVEABILITY CONDITIONS
MODELS AFFECTED:
1987-1992 ALLANTES
Some 1987-1992 Allantes may experience one or more of the following driveability symptoms:
^
Engine surge/miss at idle with high electrical or A/C load
^
Erratic secondary scope patterns
^
Intermittent stalls
^
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 ECM ground. This results in erratic EST operation as commanded by the ECM.
