boost issue help

[Jetta00vr6]

Ok the situation is as follows....

tonight i decided to take my b5 s4 to the strip.. on the way down.. i noticed a major power loss.. felt like it wasnt pullying hard.. etc.. it was 96 Degree's out.. so i figured that was my issue..

i get to the track.. and i make a couple pass's 14.4, 15.5, 15.7... now im concered... i realzed im only boostingto 10psi and holding there... my normal boost is spike 14.. then holds at 12..

i have no idea what would cause this? or how to go about trouble shooting it.. no cel's or anything..

on my way home from the track.. id rip here and there... and everyonce in awhie the car would run normal and pull hard... but then back to the slow feeling?/

could i have a bad n75? tiny pin hole in my vacum lines?

any help would be greatly appriciated!

thanks

[Jetta00vr6]

current setup is a stage 3 setup except for the upgraded inter coolers... im still running a mtm stage 1 tune running 12psi


normal run pass for my car is a 12.3 - 12.8 on a decent launch??

soo im clueless on this..

just replaced my slave cylinder last night.. and i was shoving my hand down into tight spots of the engine.. by the turbo and the battery tray/firewall... im like 99% positive i didint touch any vacum lines... could it be dirty inter coolers? not letting it breath? or even a dirty air filter.. deff felt like it was fuel cutting as well

[bluB5s4]

egt sensors they dont set the cel off and your power can be on and off

[Jetta00vr6]

Hmm it still has power. Just ain't boosting to what it should? I'll have to check into that sensor

[Jetta00vr6]

forgot to mention it seems like its taking longer to spool the turbos as well.. like instead of hitting full boost around 3k.. its more around 3-4k

[Jetta00vr6]

Did some research.. It's 2 psi lower than normal.. Sometimes it hits 10psi and holds.. Sometimes it hits 12 then back to 10 and holds.., then the normal 14 then back to 12 and holds. From a lot of reviews with the slow spool and -2 psi. Everyone's saying n75.. So I'm gonna try that for now. And will update the outcome

[BlkdoutS4]

Boost leak

[Jetta00vr6]

Ya I just tried my mbc.. Won't boost past 10psi. I must have ripped a line when I changed my slave cylinder.. I have no idea where to start