My car keeps over boosting, cant find the problem. Checked all the vacum lines and they are all connected, i even turned down the boost but I keep getting a overboost engine code

 

did you just install a MBC. If so which one cuz i am having a similar problem. Also which way do you have it connected?

 

turbo xs, i used the the lines coming of the turbo and wastgate. what i don't understand is how can the computer trip an overboost code when im not using the originall boost solenoid.

 

Did you cap the boost solenoid???

 

I caped the boost solenoid and I never had a problem before until now.

 

Ken at pruven performance told me to try these two thing to find out what the boost problem is.
You run a line directly from the turbo nipple to the wastegate and you take a test drive. Hooking it up this way you will get the lowest boost possible. Try to duplicate the driving conditions where you having the problems. If your not overboosting then your wastegate is working fine. Then it might be the MBC your using. Which at that point you borrow or buy a new one I would try a different brand MBC. Then if it runs good then it was your Old MBC if not then your wastegate is more then likely the problem. I had a similar problem and so far it's not my wastegate. when I have the time on tuesday I will install my new MBC and my problem should be fixed (My fingers crossed)