Hi, ive been the owner of a 2007 s3 for the past few months, all has been well up until this point!
Last week i did a few of the standard upgrades inc re-map
Standard exhaust full De-cat
New speed induction kit
since the re-map Ive noticed a drop of in boost at lower revs around 3500-4000rpm
When you put your foot down the boost comes in fine then drops off around 3-4000rpm, when the boost drops you get a little chatter from the air filter like you've lifted your foot off the throttle, then it goes and pulls fine through the later part of the rev range, also when your flat out and going through the gears the boost seems really weak after every gear change.
Sometimes the car feels quick but there is defiantly a problem somewhere and its doing my head in!!! We have had it on the ramp today and had a good check over the hoses etc but cant find a leak!
I hope that made some sort of sense!!, any help or ideas on what to check would be appreciated