I had a perfectly good runnning sr20 in my car, swapped in a new longblock, and now whenever my car hits boost it starts misfiring. I can get the car to rev up to 7k as long as i don't hit boost. I think it might be the MAF but am unsure how to check (SAFC says 1.8-2.0% at idle). Been trying to troubleshoot for like a week and i'm out of ideas...

Thanks
Chris

 

sounds just like my sr