Hi There,
Just had a play with VCDS.
I ran the Readiness check (
http://www.ross-tech.com/vcds/tour/readiness.php) Which checks various engine bits. The other day it passed all but the cats. Today it passed everything when going through, but the Evap showed fail too!
This checks the secondary air (vac??) and a few other bits. It seems to think the lamda sensor aging is fine though?
I cleared the engine faults so it clears the trims on block 032.
I ran it for a while checking through all the engine blocks and then checked again and ran 2520rpm
Block 01 - 2520rpm, temp 99c, Lamda1 -3.9%, Lamda2 2.3%
Block 02 - 2520rpm, Load 15%, Inj Time 2.46ms, MAF 18.36%
Block 032 -Idle (+) Partial (X) - B1 - Idle (+) Partial (X) - B2
1.3% -1.6% 0.4% -0.8%
I then thought i'd give the LPG a go and see what that did
Block 01 - 1120rpm, temp 102c, Lamda1 -18.8%, Lamda2 0%
Block 02 - 1120rpm, Load 15%, Inj Time 2.87ms, MAF 7.68%
Block 032 -Idle (+) Partial (X) - B1 - Idle (+) Partial (X) - B2
1.3% -18.8% 0.4% -0.8%
Also got
16684 Random Misfire P0300
16692 - Cylinder 8 P0308Misfire
17718 - Cyl 10 Ignition circuit - P1310 short to ground
17536 - P1128 System too lean
BTW - I got the 5/8 coils swapped by audi under warranty, I then swapped the last 3 so it had new coils. I've also tried two complete set of spark plugs.
I took it to an LPG guy and he played and swapped LPG injectors - I do also have the Zenit LPG software and can do some things in there, however the conclusion of the process that it seemed to be the car shutting things down and I just never got it to the point it would do anything but the above style faults. IIRC the cylinder that shuts down varies too!