AEM Tuner boost error FB problems

[sohc_mshue]

I am having some issues with the Boost error FB in AEM Tuner.  The values in the error FB table do not seem to work properly...for instance I can put a value of -12% in the +2.9psi cell.  So if it overshoots 2.9psi it should pull out 12% duty.  With this setting i still end up with about .5-1psi over target of steady state error.  Yet when I set the error FB table to 0 in all cells and pull only 1% of duty cycle from the base WG duty table I am now arriving at a steady state error of less than my target.  I should be pulling much more than 1% duty from the solenoid with a positive 1psi error at my prior setting of -12% at 2.9psi over target. 

Also in my internal logs the WG FB error control shows quick positive and negative spikes to huge duty cycle values (30-50%), but I do not see this reflected in the boost.  Is this an error in the logging?

Another problem... If I try to use Proportional gain with integral gain set to 0 it will slowly (or quickly depending on how high the gain is set) bring the FB error to the max possible FB error.  This looks like an integral gain rather than proportional.  The duty adjustment changes with time. 

I will try to get some logs of this stuff to post when I get a chance. 

[DG-FNR]

What happens if you invert the output (there is a checkbox for that)

DG

[Modular Wiring Solutions]

Use the base duty cycle map to get close to your desired boost. Then use the boost compensation map to add duty cycle if your target is higher than what you have your base map set up for (i.e. a high boost switch). Tune via boost comp until boost is relatively close and then play with the error graph or the PI method

[sohc_mshue]

What happens if you invert the output (there is a checkbox for that)

DG

The output does not need to be inverted.  Boost is at wastegate level with 0% duty.  Max boost is at 100% duty.

[sohc_mshue]

Use the base duty cycle map to get close to your desired boost. Then use the boost compensation map to add duty cycle if your target is higher than what you have your base map set up for (i.e. a high boost switch). Tune via boost comp until boost is relatively close and then play with the error graph or the PI method

Yes I know how to tune it, but that does not explain my problems.

Why does only proportional control have a time based error correction?  There must be some integral control even when there is P gain and I = 0.

Why do I see the huge spikes in the error control on my logs (using only boost error table...P&I are 0)?  I think this may be fixed now that I updated to the new version of aemtuner.  I did not see it on my last log.

Why does the boost error table not correct as much as it should?  Does it pull duty cycle or percentage of the duty in the base table?