definitely sounds like calibration issue. could you share the below settings for your car?
Fuel settings (afr under all ranges) ,Accel Enrichment (under all ranges) , TPS & MAP reading at idle and 1200-2000 rpm.
i dont have spark control on mine , i run an MSD distributor and ignition box , not sure of the cam in the car ( bought her as is) but its a built one , 8" of vacuum at idle , pulls strong till 6k Rpm , timing is set at initial 20 - 38 at 3000 , 440 - 727 too
Hey guys , im running fitech units on my built big block cars and ive installed a bunch of them on my clients cars and they run pretty well if you know how to tune / what to install.
If anyone on here needs any help with their fitech unit shoot here