Well I just got my test pipe, Greddy Profec Type S and Fuel pump installed Friday. Everything was going well, car felt like a monster. Well just now I was going to jack the car up and relocate the o2 sensor on the Test pipe to get the SES off. Well I turned the car on and immediately I notice somethings wrong!

The fuel pump is much louder and I am hearing a Loud Hissing sound comming from the back region of the car! The boost gauge reads 0 bar all the time which is wrong. What do u guys think it might be?

Specs:

2005 Evo VIII
HKS RS Intake
APS BOV
Greddy Profec Type S EBC @ 22PSI
Walboro FP
HKS DP
Test Pipe
Greddy Evo 2 Catback
Jestr tuning Mode 1 Tune
Greddy Boost Gauge

 

I just was looking under the hood and noticed a hose at the bottom of the intake hard pipe cut. I am not sure what that purpose is for that hose.