$DA2..occasional part-throttle hiccup under boost...

[dizwiz24]

Im getting an occasional part-throttle 'hiccup' under mild boost.

This occurs in between about 2400 and 2800 rpm. This would be a 100 kPA (max MAP value situation ). Im making 4 psi by 2800 rpm.

I suspect its leaning out as its still in closed loop still trying to make '128'.

What are my options, under $DA2 definition file, to fix this?

Heres what Ive done to try and fix this.

Ive set my last column (100 kPa MAP condition) of VE table to something like this:
2000: 80
2200: 80
2400: 80
2800: 80
3200: 90
3600 & up: 100

I guess I could try setting the VE values > 80 (in the rpm range where this hiccup occurs), but I dont know if that will work.


Also, ive set TPS threshold vs. RPM for power enrichment to:
2000: 70%
2400: 61%
2800: 55%
3200: 50%

However, you can still get this hiccup to occur if you accelerate any value less than the threshold to trigger PE.

im looking for a smooth part-throttle acceleration. If anyone knows this $DA2 code and can tell me if theres something else I can do, Id love to hear!

Thanks for any help!