90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
Engine Control Module: Customer Interest
ECM - Deceleration to Acceleration Hesitation
Group:
24
Number:
91-02
Date:
April 30, 1991
Subject:
Engine - Minor Load Slap In Drive Line Occurs When
Changing From Deceleration To Acceleration While Driving
Model(s): Coupe Quattro, 90 Quattro
M.Y. 1990
Condition:
Deceleration fuel shut-off remains momentarily activated during acceleration.
Production:
Introduction of improved ECU software for MPI engine management system. ECU P/N 893 906 266D
As of:
April 1990
VIN:
8A_LA208061
8B_LA13615
Service:
A)
For vehicles produced after the above
date/VIN, the new style ECU (893 906 266D) should be used.
B)
For vehicles produced before the above
date/VIN, replace ECU 893 906 266B with P/N 893 906 266BA (ECU has improved software to correct shortcoming).
Note:
Replace ECU with zone approval only. Part numbers are for reference only, contact your parts department for verification.