gt-turbo

hi guys. have just experienced a bit of a problem on my 04ba turbo ute. when I bought it there was always a slight knock when ever I turned left. now when I start her up and go about 50metres till my first left the ute actually pulls up and stops. when you try and accel it starts knocking at the left rear. the motor sometimes revs up and down like its going to stall. I put it in neutral for ten seconds then it clears and lets me drive and then goes fine. its just started a few days ago. is it my diff? any help would be great

right thanks guys. thought I had a bargain there. was told it would increase my boost to 8psi and make the car more fuel efficient. I paid $400 for it when there $1300 on the ipv.co.nz site. ill attempt a money back deal so heres hoping. am listening just don't want to accept it. cheers.........

heres the pictures of it guys. let me know what you think

so you don't know the 3 programs that are on it? I want to atleast see if it works before I demand my money back

but its brand new. hasn't locked to a car yet. I need to know what program to choose to try it.

its a black box with herrod motorsport Stealth computer module written on it. its brand new and will lock to the car. I bought it from a guy that crashed his xr6 turbo before he could install. I know how to install it but don't no about the 3 programs its got on it. wanting info on the 3 programs

just bought a new motorsport module for the turbo ute but cant find anything on what the 3 programs do on it. has anyone got one or used one and know whats the go. any info or program info would be awesome