over boost code

[Joey D]

The scanner reads super-boost but i forgot the code number. This happens when I nail it on the highway.
I never hit more than 14lbs of boost. I run Heaths tune and the ATT.

 

[Turbine Doc]

Need to check with Bill and find out why you are getting it, P0236 the code you are getting ???

 

[Joey D]

Need to check with Bill and find out why you are getting it, P0236 the code you are getting ???

yes it is.

 

[Monarkman]

Please post answer when you get it. I have gotten it too with same combo.

 

[buddy]

Well, the question is, what is the boost when it is setting the code? Is it actually underboosting. If you are already going a good speed the ATT doesnt just quick go to 14psi on the highway unless you are under load. Although Heath may have tuned for it to be 14psi under those conditions, but the ATT is only doing 7psi. So you code for underboost not overboost. And its a 10 second condition to code.

They could have just disabled that code all together, but they make the tolerances higher so it shouldnt set in most case if using a TurboMaster and GMx turbo. The ATT doesnt boost the same way though.

 

[Joey D]

Well, the question is, what is the boost when it is setting the code? Is it actually underboosting. If you are already going a good speed the ATT doesnt just quick go to 14psi on the highway unless you are under load. Although Heath may have tuned for it to be 14psi under those conditions, but the ATT is only doing 7psi. So you code for underboost not overboost. And its a 10 second condition to code.

They could have just disabled that code all together, but they make the tolerances higher so it shouldnt set in most case if using a TurboMaster and GMx turbo. The ATT doesnt boost the same way though.

You may be on to something.
It does happen before i hit the higher boost numbers so maybe the boost is lower than what the computer wants at certain throttle positions.
I will have to do some more research.

 

[Monarkman]

Mine was for low boost and I understood what happened from you posting something like this before.

 

[buddy]

I have the programming tables and an ATT, I can see exactly why it would set the code for you. I just disable the code all together in my own PCM program to avoid it with the ATT. Although I have programmed it before to just work correctly by shaping the boost curve to actually match what I expect out of the ATT. The problem arises because they just set really high desired boost levels in the programming instead of actually having a "curve" of when there shouldnt be a lot of boost. The only reason it works with the TM is that they double the amount of error that is allowed before it codes.

 

[kojo]

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