Quote:
Originally Posted by Lapister
Those 2 codes are referencing both banks 1,2 lean condition. Hissing does sound to be most likely vacuum leak after the maf. Did you check the hoses between the T and plenum? You are most likely introducing unmetered air thru a leak
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Already checked the codes and found that it meant too much air, so I've suspected a leak. I've checked the hoses, all seems okay. The hissing sound seems to be coming from here:
That's why I was thinking it may be that little valve on top, but I'll check. I'm going to take the engine cover off behind the seats to get a front-on look at the engine to see if I can see anything else.
The other thing is that I may be chasing a leak that doesn't exist. The sound could be normal, and it could be something else causing the codes and rough idle.
What could it be?