I'm trying to run CL boost control with a MAC solenoid. I know it is working because I can hear it in open loop. I make a target boost table and change the values from 165-190kpa and no luck.

Lowering P gets me to spike, but it will never hold. It always reverts back to wastegate pressure. Changing I and D definitely have an effect on the boost, so I know it is changing something. Wastegate is holding. I hit boost cut many times

No matter what I make my target it always reverts back to wastegate pressure.

I can get it to spool to the wastegate pressure 300 rpms faster, but it wont rise beyond that. It's like its stuck trying to target 160kpa.

 

If lowering P makes it spike but wont hold to redline, did you then add I to hold to redline, and then lower P to get the target back up once you added I, and then a touch more I until it held better again, and then less P, and more I, and less P, and more I until you were happy, and adding a little D in there to keep things smooth?

 

Made a dumb mistake, I realized I had it connected wrong. 0% was wastegate boost and 100% was closed wastegate. I now routed the lines on the solenoid in the correct orientation, so 0% is closed wastegate and 100% is wastegate boost.

I only tried it in "basic" with the slider since I only had the 15 minute drive to work. Still didn't work. I will give it a go in "advanced" at lunch time. Thanks for the input

 

Got it running 14psi perfect and then my computer died so i didn't save the tune. After that I would hit false boost cut anytime i tried to make more boost.

 

if laptop was connected, the tune saved.

 

My boost gauge was reading 2psi lower than the MS, this is why I thought it was false boost cut. Got it running 14psi awesome now.

 

I know your car is running fine... but are you sure this is the correct way? I don't know what firmware you are running but with the latest one.. closed loop will only work if 0% = wategate boost and 100% = closed wastegate.

 

I thought I read a post made by the programmer stating what was correct. I did have a suspicion that I am incorrect. I can only add P, adding any I or D makes it overshoot and be unstable.

Another weird thing is that even with just tuning with P, the boost is incredibly stable. +-5 kpa all the way

 

On the latest firmware 100% is closed wastegate.

 

My settings are 0% duty cycle closed, %100 duty cycle open and then have "inverted" selected.

 

Thanks for the confirmation.

As long as it works