When im stopped at a light for some reason my */c gauge pin kinda goes up and down a bit. Could this be a serious problem or just somthing simple. Im kinda new here any help would be appreciated

Where is the needle located and how far does it move?

WOW that was fast, the neddle is @ -70 kpa on the gauge and it just goes up a little and kinda just bounces up and down a bit iv had the car for about a 2 monthes i dont think it always did that i noticed it after getting new exhaust but cant see how that would do anything????

Mine does that too. I have removed my intake screen, new high output exhaust, and a smaller pulley probably all contribute to mine boiunceing. I notice once I get above around 20 MPH it stops and settles down. I don't think that it is anything to worry about unless you start to see drastic changes in preassure while stopped or at idle.

Your new exhaust, is it a factory replacement or a performance upgrade exhaust?

BTW: Welcome to the club.

my exhaust fell off at the resonator 2 days after i got the car so i toke off the resonator got new pipe, dynomax muffler and dual 3" stainless tips.

Does that bra u got cover your grill? i wanna get one but i put in an aluminum grill and dont wanna cover it

Yea it does. I know there are some out there that don't, but not sure where they are. Any hood bra you get will most likely cover the grill. Mine is mostly just mesh but has a thin strip down the middle of material (covers up the emblem).

The new exhaust you put on my have something to do with the needle flux. If there is more air going thru the engine it might play with the backpreassure, vacume system, and a few other related systems and could possibly cause the flux you are seeing. I can't say for sure that everything is working perfect butI have had the same thing going on for some time now and no problems because of it.

worn bearings in the nosedrive can contribute to some needle bounce.

At idle, mine hovers around the -10psi, like from -10 to -9 psi.

Otherwise, everything else seems fine.