Ok i'm boosting negative boost from idle up until I hit 0. I definetly have a leak but why would it slowly pull to 0? Also my map sensor code is throwing sometimes if I get on it a little yet it is reading no boost and it definetly doesn't feel like i'm pulling 10psi or anything. Also on a greddy kit how do I adjust the wastegate. For some reason we think it isn't opening and that is why the map sensor goes off. The thing is though i'm not boosting yet it still goes off. Could it be the lack of a missing link?

 

TTT

 

who did your install . . . . . going from negative to 0 is just vacuum Sounds like you have a leak some place . . . check all your couplers and piping and what not, and check your electrical connectors. hat are you using for fuel managment?