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#1
19th November 2014, 08:22 PM
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Air leaks?
Car: 1996 A8 4.2 auto
So im getting some **** poor mpg at the moment. Driving like an absolute OAP im getting 16.9mpg at best. Thats a mixture of 40 and 60 mph roads. I have noticed a split (read hole) in one of the crankcase breather pipes. Now im not getting any engine surging or cutting out like you would normally associate with an air leak so have ignored it. BUT it leads me to start thinking it is upsetting the mixture? Thoughts? 
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#2
20th November 2014, 08:07 AM
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Have you given it a scan?
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind.
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#4
10th December 2014, 06:22 PM
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Ok, so scanning brings up codes of mixture adaptation so im assuming the split crankcase pipe is letting in air after the MAF. So surely isnt the engine going to run a weak mixture with that extra air going in OR are the oxygen sensors picking this up and causing things to richen up
 Going to replace the pipe/clear codes and report back
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