Engine - Idle Vibration

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Classification: EF & EC 91-003


Section: Engine Fuel & Emission Control


Models: 1990-1991 Q45


Date: January 2, 1992


Reference: TECHNICAL BULLETIN ITB91-053


Q45 IDLE VIBRATION

APPLIED MODEL: 1990 - 1991 Q45 (G50)


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 following countermeasure parts can be installed to reduce this vibration:


PART DESCRIPTION PART NUMBER

Engine Mount-Front 11220-60U11

Control Unit (ECU) - FED 2371M-64U04RE

Control Unit (ECU) - CAL 237IM-64U64RE

Compressor* 92600-64U00


*Note: Use the new compressor ONLY if the vibration is confirmed to be worse with the A/C operating.

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:


OPERATION OP CODE CS PNC CT FLAT RATE

Rpl One Front Insulator AW10AA 4S 11220 31 2.2 hrs.
Rpl EFI Control Unit DE28AA 0.3 hrs.
Rpl Compressor Assembly TD18AA 2.0 hrs.
Evacuate/Recharge TB888A 0.9 hrs.

NOTE: For this service procedure, the above operations must be claimed in combination under PNC 11220.