Engine Performance - Checks and Recommendations
GROUP: 24NUMBER: 93-03
DATE: April 30, 1993
SUBJECT:
Engine Performance
MODEL(s):
100, Engine Code AAH from 1992 m.y.
Vehicles with Engine Control Modules
4A0 906266, 4A0 906266 A,
4A0 906266 AA, 4AO 906266 AB
This Technical Bulletin lists recommendations and background information regarding engine performance. Possible and likely performance behaviors are listed in the following tables in four categories:
Table 1
Table 2
^ frequent
^ less frequent
o seldom
- not a cause
POOR DRIVING PERFORMANCE
Use VAG 1551 Scan Tool to troubleshoot all engine performance complaints. For explanation on how to connect and use VAG 1551 Scan Tool -> Repair Manual, Repair Group D2.
Test conditions:
^ Engine basic setting OK
^ Perform automatic test sequence with VAG 1551, address word 00.
^ Erase DTC memory.
^ Test drive car for at least 5 min. During test drive push accelerator pedal down once all the way and drive car briefly at more than 4000 RPM.
Caution!
Taking measurements while driving diverts attention from the road which can lead to injury or worse. It Is difficult to read and record measurements accurately while driving. Always use a second person for this task.
^ Read DTC memory again and repair according to Repair Manual, Repair Groups D2, 24 and 28.
^ If it is necessary to replace parts, print-out DTC memory and attach to file copy of repair order.
^ Use the following information to assist in performing performance problems.