91 Octane

Car would cut-out due to what it looks like overboosting. I have 15.95 springs in them. Mac valve wires are not connected as well.

53 percent ethanol content read

I added the second O2 sensor after the down pipe

Over boosts, causes throttle closure, then goes to wastegate pressure. Any ideas? ST new 3 port mac solenoid.

Apr high torque 91 oct