This is commonly referred to as throttle hang. Did you change the throttle maps over? The airflow map is most likely ass about now and it is pegging at minimum airflow however minimum airflow is obviously way too much.
You could probably hack up dashpot to fix it but to fix it properly you'll need all the ETC and throttle related stuff fixed.
Basically the engine is emulating an idle air valve using the throttle body itself, however the minimum airflow figure is now a lot higher due to the larger throttle blade.
The issue is the phantom knock can be quite severe. How many degrees does it pull? You can adjust the sensitivity by I've personally never looked into this, it's soemthing you'd have to experiment with.
We will pull the mainline dyno figures and display them in our software. So you will simply need a y cable. This will be something that comes in a later update.
Yeah right now this is something that will work and only took me half a day to draw up. Can bus will take us a few weeks so its lower priority than the datalogger and the next software update.
There are only 3 possible options. Danny Pirrotta will look at building a kit for all 3 including a value file so that people don't have to understand how it works. It will simply "just work".
Circuit 1
4 Position switch in the cabin (no flex fuel).
Position 1 E85 High Boost
Position 2 E85 Low Boost
Position 3 98 High Boost
Position 4 98 Low boost
Circuit 2:
Uses a rotary potentiometer in the cabin (no flex fuel)
E85 with variable boost (0-100% boost)
98 with variable boost (0- 80% boost or whatever you desire)
Circuit 3:
2 position switch in the cabin (utilises the flex fuel kit)
Position 1 Flex fuel with high boost
Position 2 Flex fuel with low boost
It would be something like 0 to 0.7 v is the low boost and 0.8v to 1.5v would be high boost. So you would divide the resolution. I would then use a 3 pole switch to toggle between the normal flex setup to this. It's a bit tricky to work out the resistor values do I might wait and see if there is any demand for it first. Have to get my old electrical engineering books out to do the maths for the values.
The alternative is get the can bus input working instead.
The two scenarios described wouldn't work with flex.
A third scenario would be to use a flex fuel sensor and a high/low boost switch. I will add a diagram for this as well.
The single pole 4 position switch. It has 4 positions E85 high, E85 low, 98 high, 98 low. You then setup the fuel and boost ramps as per the photo of the whiteboard. I will make up sample tables in the editor shortly.