ok guys need help big time checked all forums for this just replaced the wastegate on my car...need i add that this is the first time my car has boosted in the the yr in a half ive owned the car so idk whats norm or not...ok when i first put it back together i had the hoses from the n75 to turbo and wastegate backwards so my car would go to like 20psi before my ecu kicked in...swaped the hoses and got a straight 8psi but which was only good for about a day i was boosting 8psi when it just dropped to 5 psi wont go up over it....ok ive checked for vacum leaks had one at the dv hose now no more leaks so it still wouldnt go over 5psi so i swaped the hoses again to see if it would go back to 20 but it still wont go past 5psi...besides a leak and the dv which i recently just replaced what else can cause this no cel codes no rough idle and the only weird thing i hear is it almost sounds like i have a blow off valve if i turn off the stereo i can hear it when i shift..my thoughts were n75 valve or maybe the wastegate is maybe stuck a bit open ? any other ideas

 

any CELs? could be limp mode..

 

no cels

 

car runs good no rough idle no sputter just only boosts to 5psi.if i disconnect the n75 will it let it keep boostin outta control again?

 

Need to check if there are any codes because the car could be stuck in limp which is 5psi. That or your N75 broke and is causing it to open the WG which would also be 5psi, basically the same thing limp does by opening the N75 all the time.


If you discounnect the vac lines from the N75 the boost will just keep rising till it hits max and then tapers off.

 

k disconnected lines and went to 20 feels good lol now does this mean my n75 is bad? no cel codes

 

It is either bad or the ecu is stuck in limp.

 

well hope its the n75 what causes limp? and i switched lines from the wastegate to turbo and before it would also launch to 20 psi but now it makes it to a high 6psi im guessing start with the n75 if it continues would i have to replace my ecu?