Also did you check here... jnz usually stays up on whats in stockhttps://jnztuning.com/product/ostar-mitsubishi-1g-awd-dsm-gvr-4-rear-subframe-bushing-kit/
Making your own poly is pretty easy.. i made my own for my trans side until I got a better one from boostedfab.As a matter of fact if you reach out to them they may do some solid bushings for subframe.
Honestly if youre not sure whats going on with the cams you are going to be fighting this forever. Guessing will only keep adding to your frustration.If it were me Id redo all timing and make sure my cams were degreed properly.Cant fix...
Basically, your ecu cuts the fuel to 0 (InjOn) whenever you take your foot off the gas (IdleSw=1) and your rpm is greater than your target idle + FCoffset. (There is actually a delay of about 0.7 seconds to do this cut).
Then as your rpm drops...
I was trying to read through to see what your base idle is. It looks like iys idling almost at 1100 rpm based on your picture.You may want to try adjusting fcoffset by 200rpm to compensate and see how that does for your catching of the idle...
Ecmlink does a great job for most of us. If I was going to ever leave it behind it would be for fueltech. Just so many features and pretty easy to configure. I believe fueltech would require us with 1g to add a crank trigger... but thats not a...
They are VMS. Im always skeptical. Ive only used ngks for years but the resistance readings are promising. Of course there are several factors other than resistance on performance but I was impressed initially