I flex the @RossTechVCDS and @jackalmotorsports software to update my stage 1 tune, do a throttle body alignment test, fuel trim evaluation with vacuum leak test, plus a breakdown of how to read camshaft adjustment and adaptation values to understand possible timing issues.
Featured products:
Jackal Motorsports tuning cable: https://www.jackalmotorsports.com/product/jackal-motorsports-tuning-cable/
Ross-tech VCDS cables: https://store.ross-tech.com/shop/cat/VCDS/
VCDS test summary:
Throttle Body Alignment - Using group 060, view throttle valve sensor 1 and 2, and toggle basic settings to initiate the automated alignment.
Fuel trim - Using groups 032 (long term fuel trim) and 033 (short term fuel trim), monitor adaptations applied to rich and lean conditions across both banks.
Camshaft adjustment - Evaluate groups 091 and 092 for differences between adjustment, specified and actual timing per bank, plus 093 to understand what adaptations have been applied to achieve actual adjustment.
Chapters:
00:00 - Hi and test outline
01:40 - Throttle Body Alignment
03:44 - Tune update with Jackal flashing cable & tuning suite
06:41 - Fuel trim
13:00 - How variable timing works on the 4.2
17:54 - Cam adjustment
22:37 - Inside the castle walls