SO I made a custom SRI from a few spare pieces I had laying around from my 98 grand prix gtp. removed the air vsc so no codes popped up. no matter where I placed the MAF sensor the car idled like it had a cam. got multiple DTC codes such as MAF sensor low voltage, misfire on a few cylinders, etc. I had it placed either by near the filter or by the throttle body made no difference. the intake tubing is 2.5" fwiw. I jus gave up and threw back in the stock air box with KN drop-in filter and it ran 100% fine.
I thought I read somewhere either on here or the fb group that some 2zz are that sensitive on the type of SRI/CAI?