wierd boost issue...(searched)

[240guyNY]

hey i just got my swap back a few days ago. I have a profec b and most of the possible bolt-ons. since i got the car ive been running 8psi. Today i turned it up to 13. But on my autometer boost gauge the needle bouces between about 11 and 13 extremely fast but my greddy profec b just read 12.5 psi. Which is right? is my boost going crazy or is my gauge messed up? Could it be that my boost is going crazy and its changing so rapidly that the profec b cant register that fast and just reads around 12.5?thankssean

[teddy]

Probably the gauge is screwed up. Make sure you've got your gauge signal lines tapped into the right place as well.

[Tartan]

Does your car feel like its going from between 11-13psi really fast? Maybe look for vaccum leaks.

[240guyNY]

not really, but also it only happens when i have the profec b on the high setting. Even if i hold the throttle so it stay at about 9 psi, the gauge still goes crazy. But on the low setting its fine a 9 psi. stay at 9 perfectly.

[9240sx]

Have you messed with the Gain on the boost controller.My profec b was doing that to and i just messed with the Gain and it stop doing it.My friends WRX was doin the same with his profec B and it was the Gain too.

[240guyNY]

just a little bit. im still breaking it in so i didnt really wanna beat on it yet. for now i have it on low setting, at least for another 150 miles. Is your gain set towards the high side or low side,sean