On my own car ....
I eliminated the POS FJO Injector driver, can give link to it if needed.
For the ID1000's I run they do need specific injector lag times to be tweaked in your ECU to enable good running at idle. Also for whatever reason *real AFR* as measured right out the back of the turbo you will find the engine is most stable at high 11 AFR to mid 12 AFR, much north of this leaves little margin and the engine can become unstable and want to stall.
Any revs higher than 1200rpm and with some load applies you can run stoich mixtures (14.5:1) no problem at all.
Most of its in the mapping and correct injector set up *lag times* in the ECU, these do vary with fuel pressure also which is listed on your ID injector sheet. I run 55psi static pressure @ 0 gauge pressure.
I'm sure you will sort it out
