Ok i have a 87 daytona z and at full throttle some where around 3500 to 4500 it just stall hard. But at partial trottle it does just fine.

 

sounds like overbooting the computer shuts the injectors and spark what boost pressure is it showing?

 

Im showing about 1 bar.

 

i was wondering if it was because it may be just over 1 bar and need a 2 bar map sensor.

 

If its stock it shouldn't cut out it shouldn't go higher than 14.7psi that is max where the computer will shut down I had one that did that but I have vaccum line issues. The stock map is a 2 bar. Look into the vaccum line routing. Is this motor all stock ?

 

yeah everything is stock except the air intake.