2007MY Q7 4.2 FSI
Only recently acquired. Has travelled 220,000km, in the hands of a very lazy owner who probably neglected most service
Throwing the codes and MIL that would indicate a problem with left bank inlet valve camshaft timing
I have swapped the Hall sensor for that cam with the one from other bank ... fault remains the same
Then swapped the solenoid valve similarly with the same other bank. Again, fault remains the same
I have not yet looked at measuring blocks, but apart from the possibility of some obscure wiring defect, it seems very likely to me that I have a bad adjuster on left bank inlet cam
1: Any comments on the diagnostic carried out so far?
2: Is this likely to be related to the tensioner, and am I correct in understanding that 2007 model year V8 FSI cars have a modified and improved tensioner, so not so likely to be the problem?
3: In a Q7 should I be able to replace a tensioner with engine still in the car?
I think that sums it up
Any help would be much appreciated