hey everyone.
I just got an 99.5 audi a4 quattro 1.8L turbo. has 117.000 miles on it and runs clean and smooth. I installed a boost gauge over the weekend and am starting to think i got a boost leak now. The boost peaks at 6psi then starts to drop of a 4500rpms and slowely falls down to 2psi before the next gear. i'm assuming this is not normal but wanted some input from you guys before i go and put it in the shop.
thanks for any help

 

yes its normal for the boost to drop off at high rpms but thats too much. i would check for boost leaks

 

Sounds like a boost leak, so check!

 

humm i think i figured out where the leak was...i didn't clamp the hose back onto the TB. There was no clamp on there before but damn do i feel dumb lol.
quick question what is the stock boost for my car...i searched everywheres but only got one person saying 7-9 psi just wanted to check

 

7-9 is right.