Hello, im new to the forum. I am pretty mechanically inclined but i cannot for the life of me figure out why my 1988 turbocoupe falls flat on its face the very moment it hits boost around 4k rpms. there are no obsrtuctions in the air tubing, basically every electrical ignition component (accept the ecu) have been replaced. i bought the vehicle with this problem and it continues to plague me. any help on my next direction? Thanks!