Thanks man.

 

I dont even want to get into the problems My car has had in the past due to ***holes making money off of someone who wasnt really aware of what they were buying. But ever since my catalytic converter was replaced (at the Dealer) My car has never boosted any higher than 12-13psi. With my cat "dead" my car was boosting off of the gauge (due to back pressure)

 

Yeah, a clogged cat will def cause your boost levels to sore.

What did your car boost before you had a clogged cat?

 

lol.. No problem.. I'll back the truth any day of the week

 

Any thoughts on the OP's boost issue? Sounds like a vac leak or solenoid prob to me.

 

got a diagram of how they should look? im almost positive they are rigth but ill try anything!

 

https://www.cobaltss.net/gallery/fil.../3/5/8/030.jpg

^ this is the best pic I could find in my images. If you look carefully you will make out where each line is going.

 

yeah, i'd say bypass solenoid is bad/hooked up wrong as well... If it also happens to have terrible fuel trims and smoke like a diesel at wot the dealer may have flashed a stock tune to the car not knowing it was staged...

 

this is what I was talking about I paid $100 for a guy to put on a "stage 2" pulley.
I didnt know about this site then......... My car was boosting 15psi after he "did the work" well I came to realize he wasnt answering or returning any of my calls. Well of course I have some one look at the car and the tell me I had a stock pulley on my car... It was still a pressed on pulley and to my knowledge the arnt any aftermarket ones available that press on..... So thats when everything went downhill as far as boost...

 

It is running really rich tooo I dont know if that helps

 

Back in the beginning of time(when dinosaurs roamed), there were some press on pulleys available for this car. It wouldn't technically be a stage 2 pulley then, but there's a SUPER SLIM chance it's an undersized press on pulley..

 

That is a good point.

If the dealer flashed the stock tune back on the car after you had the downpipe replaced that would explain your "stockish" boost levels for sure! The stock tune cuts boost in order to maintain the stock 12.5psi level.

OP, take your car back to the dealer and have them check the flash. Make sure you still have the GMS1/GMS2 tune.

 

If they flashed the stock tune back on the car it wont be setup to handle the 42's, and will run pig rich. I think we may have found your issue.

 

It's probably the solenoid, if u want full boost back do the boost bypass mod. Keep in mind though that if the tune is bad and the PCM wants to cut boost it won't be able to. My car went from 18 psi down to 4 psi way back when I first put a small pulley on and had it tuned. It happened the day after I got it tuned, I did the bypass mod and got the boost back and checked the tune to make sure nothing was wrong.I ran the car for 2-3 years with it unpluged, just recently put it back in so that I can get the boost cut in first gear

 

So The dealer said it would be on record if they messed with the flash and he said all he sees is in 06 (before I had the car) it was changed. Im assuming that was when the guy before me had the stage 1 kit installed.

 

The dealer should be able to read how many times it was flashed and what exact tune was/is on it (if it's a GM tune).

 

Ok so I do have the stage 1 flash and its not running as rich as I thought. But Im pretty sure its not a vacuum leak so that leaves me with replacing the boost bypass actuator?

Eaton Supercharger Bypass Actuator Cobalt SS Redline | eBay

If this was bad would it cause my problem?
And I tried the boost bypass Mod last night and it did not change a thing.........

 

Yes. A bad bypass actuator could cause the issues you are seeing.

 

So there is a boost bypass actuator which is the canister thing and something called Supercharger Bypass Valve Solenoid Control Circuit PCM. I heard the Supercharger Bypass Valve Solenoid Control Circuit PCM throws a CEL that says exactly that. I have no CEL so im going to assume that is fine. And With my gauge being jerky/sticky I would think thats showing the boost bypass actuator trying to work but is going bad? Any other ways to check that? Last call! lol who thinks Im on the right track!?

 

Dont worry about the reflash and crap. buy 60# injectors and get the car retuned then you will see the gains

 

Correct. The boost bypass mod is for testing if the solenoid is ok. Yours checked out fine, and you have no CEL. The actuator on the blower is what opens and closes when you go in and out of boost. When you are in vacuum the valve stays shut, and bypasses the air going into the intake manifold. When you punch the gas, and boost, the actuator opens. If that is starting to go, it could def cause the issue you are seeing with your boost.

I should have made myself more clear about the two (bypass solenoid & bypass actuator) yesterday when I was trying to help you out.

He is not worried about gains right now. We are trying to solve an issue with his boost. He should solve the problem first, than mod if he wants to. Installing 60's & a retune is not going to fix his issue right now.

 

Ok so it looks like Im buying the actuator... But before I do.. let me describe it one more time...lol.... I have a 2.8" pulley on it right now. When I get into it I see 10psi immediately then it creeps to like 12-13 but will not go any higher...I replaced any vacuum lines that looked cracked. When I tried the Boost Bypass Mod I got no more boost still the same..... So I have no CEL and that means the boost bypass valve is ok but its looking like the boost bypass actuator is the culprit.

 

boost shows restriction. more boost always isnt better. ur prolly ok. u car just has nice flow. nothing to worry about.

 

You're right more boost is not always better (i usually have to say this in every thread pertaining to boost), but his is a little low for his setup. He even noted he used to see more.

 

So does my last post make sense? Cause im going to buy the actuator today if thats what "we" think it is... My biggest question is when doing the boost bypass mod I got No More boost what so ever. It was 12-13 psi. that means what?