hey guys .
some of you knows that I was having a problem with my boost controlle that it wont boost more than 4 psi , this problem has solved by cleaning up the solenoid . but now I have new problem . now its boosting from 8psi to 12 psi .
I set the boost to 6 psi
and starts @ 5 psi
with 0 gain
this is my low boost
but I dont know why does it go more that my setup.

in the LCD I see a word in right upper corner (AutoP) flashing all the time . I dont know why is it apeernig and flashing

 

What lb spring is in the wastegate? Because it is set at 6 doesn't mean it will stop at 6. At 6lbs the wastegate may begin to bleed off boost but doesn't mean it won't go higher than 6.

 

the spring is puting 4psi if I run my car without the boost controlle

 

http://my350z.com/forum/1196121-post26.html

 

thank you :> I will do it as soon as I can

 

I did wht they tell but It goes to wors !!!

I dont want to kill my engine with over boosting . SOMEBODY HELP MEEE

 

 

what wrong with you guys ??? please at least say something . let us troubleshoot it and find where is the problem . I think it is somthing silly but it is real danger .

 

Do you have the lines hooked up wrong? Just let it run on spring pressure until you get it figured out. If your exhaust is less than 3" it can spike easily also.

 

the down pipe and the mid pipe are 3"
from the end of mid pipe to the muffler 2,75" because the muffler inlet is 2,75"

I also have a silencer in the muffler . when I run it with the silencer it goes to 8.5 PSI
but when I remove the silencer,it goes to 10 PSI and 12 PSI .

I know my car very well . It goes more aggressive when it goes on more than 8 PSI .

its really very dangerous .

 

That sounds normal to me. Less restriction and it can hit boost faster so the increase without the silencer is normal. I thought your motor was built, if it is built, you don't have to worry about those numbers if you have a good tune. The psi you are hitting sounds normal, the way it boosts with a 4lb springs sounds normal to me also. I have a 5lb spring and I can hit anywhere from 8.5 to 10 easy, and my exhaust right now is 2.5" and alot of us are on stock compression.

 

OK I running with A/F 11.2 .

but my boost control was working good . when I set it at 8psi it makes 8psi no more no less .

the problem is Im setting a lower boost but it makes higher than what I have sett .
may be I have to calibrate the boost control if there is a way to do it .