ok just hooked up my greddy boost gauge and its all good.. but when i put the key in the ignition and start it it goes all the wayto 30 psi and then to my idle -19. so then i turn off the car and take my keys out the needle goes all the way to the bottom. past the -30psi.. what is going on? thanks

 

your car is running, so there is minimal air flow. that is why the needle doesn't rest at "-30" and notice when you accelerate, if hooked up right, it should increase from -19 to 0 and then beyond to whatever your running at..for instance 15psi.

 

i know that.. i had a autometer one in my srt4 and when i took the keys out it stayed at 0.. and when i started the car the needle didn't go all the way up and then down.. thats why i think its weird..is the greddy supposed to do this?

 

So of the other gauges dont have stops installed. Dont worry about it. I would be concerned about when it is hitting zero.

 

must be an electrical gauge, it needs power to read correctly, sounds normal to me.

 

its regular bro.... its jus turning off... the mechanical ones will always read zero as they are already calibrated to start from zero while the electrical ones do that lil opening display if so equipped SO in other words... ITS NORMAL

 

thanks to everyone that replied.. i appreciate it..