Would someone be willing to help with tuning a 2017 Camaro ZL1?

Attachment 22169

So here is what I'm looking at.
MAP is in RED. That is the Kpa I was making when it was all working good.
Later, It dropped to 121Kpa. I'm still not convinced that the issue lies in the ECU. I suspect a mechanical discrepancy.

I say that because if you look in the YELLOW, I have the commanded (due to the coefficients) and the Driver Command are all up there AND they changed after making the appropriate changes to the file (I looked at other logs to double check).

But then I look at the top YELLOW at the boost solenoid and I don't ever see it change....ever!
I've never datalogged it before or looked to see if it "should" change.

So that's what prompted my questions.

On a side note, I have an E67/LSA motor in my shop that is experiencing HUGE belt slip. 2.4" upper pulley and it's smooth. That thing feels like a misfire on the dyno! It will slip, then grab again. I see it in the Kpa reading. It's erratic.
This one is either doing a constant slip...all the time, or I just assumed I did something wrong in the file to prevent boost from occurring.

Quote:

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Originally Posted by GR8GAME

I'm datalogging the MAP sensor
I'm seeing 120kpa.
In previous pulls, I was seeing 185kpa.

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Ah, I see, I was looking at the other log first.

( also log GM.ETCTP, this gives a better idea of what the electronic throttle is doing )

sampling rate seems rather slow (6 per second), you might try the following:
- drop one pid to get channel count down to 24 or less;
- Edit->Properties->Logging->Scan Mode: try a different mode.

In Log_147, MAP goes up to only 82.6 kPa... but then throttle is not used much, trims seem to be doing something, but nothing else is going on.

Quote:

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Originally Posted by joecar

( also log GM.ETCTP, this gives a better idea of what the electronic throttle is doing )

sampling rate seems rather slow (6 per second), you might try the following:
- drop one pid to get channel count down to 24 or less;
- Edit->Properties->Logging->Scan Mode: try a different mode.

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I'll look at that. Thank you for the pointer.

I keep it at 24 for most tuning and I have multiple PID selection files for tuning different aspects of the engine or trans. But when I started troubleshooting, I just added a bunch of PID's to see where I should attack for a problem.

Quote:

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Originally Posted by joecar

In Log_147, MAP goes up to only 82.6 kPa... but then throttle is not used much, trims seem to be doing something, but nothing else is going on.

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I may have uploaded a troubleshooting or partial throttle LOG by accident.

Attachment 22174

The bypass might be beeling boost , post your tune file .