I had my timing chains replaced this past March and the car runs and drives
fine from what I can tell, but I just got a VCDS and checked my timing
and the values seem way off.
The blocks read as follows on a fully warm engine:
208: -6.0 (spec is 0)
209: -1.0 (spec is 0)
90: Duty cycle= 52.2% Adjustment Bank 1= 22.0 (spec is 0)
91: Duty cycle= 45.5% Adjustment Bank 1= 3.0 (spec is 22.0)
It appears block 90 and 91 signals have been reversed and I’m not sure
why (and the duty cycle is much higher than I think it should be).
Also the spread between 208 and 209 is greater than 3.
I did some digging on the forums and found that it’s possible (and
very easy) to accidentally swap the cam phasers when putting the
engine back together. But I peaked in through my oil cap and was able
to see that the part number for the intake phaser and it was installed
correctly. Also, I made sure the cam sensor wires were not mixed up
(they were in correct). I’m thought it’s possible that the cam
position sensors themselves could be shot at this vehicles age, but I replaced them the other day and the values remain unchanged.
Again, car seems to drive the same as it always has and it isn’t
throwing any codes, but those mixed up values for blocks 90 and 91
have me puzzled and concerned. Not to mention the spread of 5 between
208 and 209. From the forums, I read that a deviation on any of the
blocks of ~11 corresponds to 1 skipped tooth. The deviation on blocks
208 and 209 are nowhere near that, but they are much further from zero
than I expected. The deviation for 90 and 91 could potentially point
to two skipped teeth though (I think).
Any advice would be greatly appreciated. I don’t want to jump the gun
and assume the shop mistimed the engine, but I feel like anything is
Based upon those readings should I assume the car is mistimed by a tooth or two or is there something else I missed.
The car also is getting a random misfire in all cylinders according to the data logging, but isn’t throwing any codes. It’s always kinda hiccuped or hesitated around 1800-2000 rpms when accelerating from a dead stop. I feel that could be fuel injector related, but thought it may be relevant or related to this matter.