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New to me 2004 A4 with a 3.0 V6. Timing was done prior to purchase but I have a persistent cyl 4 5 6 occasional misfire and would like to check the correction values (measurement block 93?) to determine if the new belt was correctly installed. I have been unable to find a definitive guide on this topic and how to interpret offsets and phasing etc. Could someone be kind enough to point me to a resource?