Engine - Vibration at Idle
Models: 1990-91 Q45Section: Engine Fuel & Emission Control
Classification: EF&EC92-002
Bulletin No.: IT892-018
Date: March 20, 1992
Q45 IDLE VIBRATION
This is an amended version or ITB91-053. Please disregard ITB91-053 and use this corrected version.
APPLIED MODEL: 1990 - 1991 Q45 (G50)
APPLIED DATE: Built before 7/19/90
SERVICE INFORMATION:
Some 1990 & 1991 Q45 vehicles may exhibit an idle vibration (rough idle) which can be felt through the steering wheel, seat, and floor.
The idle vibration is most apparent when the engine is warm, the transmission is in "Drive", and the brake pedal is depressed while stopped in traffic.
SERVICE PROCEDURE:
If a vehicle is confirmed to have this condition, the countermeasure parts can be installed to reduce this vibration:
Reference TSB ITB90-028:
If necessary, the adjustment procedure provided in TSB ITB90-028 dated September 27, 1990 may be applied to further reduce the vibration.
WARRANTY INFORMATION: