well i have a 2.9 with the stage 2 and for some reason, ever since i had it.. between certain speed it will kick me from 15 psi to 11 psi and then back with in a split second back to 15..it only happens between 3rd to 4th in high rpm's past a 6 rpm..my boost guage though shows 110 kpa since im in canada the whole time but in hptuners it shows clearly what is going on...i'm stumped on what it could be and i'm trying to find some info on the net about it but can't find anything...hopefully someone know's or can give me some help b/c it's really pissing me off...

 

Check for belt slip... or if you don't have the belt on right (just throwin' that out there)

Sounds like belt slip or the boost bypass isn't set up properly!

 

I'd say bypass if the belt is in good shape. How does your bypass filter look?

 

well to be honets i have no idea what that is...i'm a noob to this car and i'm trying to figure out what things are still in the engine...

 

its a little square piece of foam on the bypass switch...find the black round bypass on your supercharger and follow the line back towards the firewall...you'll see it

 

Are you seeing any knock? You are using premium fuel arent you?

 

Yeah forogt about that, if your car notices any knock it will start dropping power out and doing all sorts of crazy stuff to it!

 

i'm using premium gas, always have and with knock and with out knock it does the exact same thing on the exact same spot for every single run..

 

It's either belt slippage, or your bypass is messing up! Take it to the dealer and have them check it out!

 

not covered under warranty other then power train and the stage 2 isn't registered from them, got it from someone on this forum and i've had horrible experiences with the dealership here...

 

Well then I don't know what to tell you, but how do you not have a warranty???

 

all i have is powertrain warranty left and i'm not going there to get them to check the engine and have them charge me up the ass for something i can figure out myself...or like the 2nd last time, where i ask them to change 1 thing and they decided to reflash me to stock even though i have 2.9 with 42's and the worse, make the car barely turn on where it struggled to come on and even stay on....so dealership...

 

Damn I haven't heard anything good about the Canadian Chevy Dealerships!

My dealership here is the ****... they could careless what I do to my car!

 

from 1 of the dealerships i went to..."we only pay our tech's to fix parts that are installed by us and covered by us, not from what you get and install somewhere else...it isn't fair for the techs" and the best...they try to charge me $60 to get my car lifted since i have eibachs on the car and it takes them "about 20-30 mins to get it up..