Having some recent troubles with my car

Its ann 88 Crx si, d16a6 motor with soe forged internals. Running turboedit on 450's and a gm 3 bar. Pushing 15psi

Today i started feeling some stutterring in the rpm range, some low, but I really felt it when I wound out second, and I usually let it hit the rev limiter once or twice since the tires are just spinning, but when it hit the limiter, the exhaust went crazy and sounded like it was popping/breaking insanely quick. Thats never happenned before

Also in third gear, after rolling out second and when Ive got about 12psi in 3rd @ maybe 4800-5000 rpm the car seems to stop pulling, only noise is makes is a higher pitched noise, I cant tell, but I think either my BOV is letting off because of the load (turbo xs rfl but Ive got about 6 washers in it) But it just seems to lose power

Im running NGK BRK7E plugs, NGK fairly new wires.

Need some opinions and advise

 

What's your afr's look like?

 

Make sure your ignition is healthy, make sure your AFRs are healthy (Like Dave said) and make sure you don't have any leaks. Then get back to us.

 

What's plug gap at?

 

Close the gap on the plugs a little bit and take it out for another drive.

 

It sound to me like it's detonating...do like he said...close the gap up on your plugs some. Also, keep an eye on your A/F ratio, if you are going lean, it's almost for sure that you are detonating...not good, keep it up and your motor will pop! even with forged internals...what turbo are you running? If you a running 15 PSI on any kind of decently sized turbo, I bet you are running out of injector...you will need to go bigger...