last night i was doing a WOT run through the l tunnel that i take before i get home. i noticed something horribly different coming from the intake. it happens after about 4.5k rpm. sounded like a plastic bag or something was in the way of my intake. car started choking, and it made a shuddering sound. feels kinda like how the rev limiter feels like. did it in every gear at almost the same RPM. i did not try it 5th gear. pulled over, pop the hood and checked the intake. it was clean, nothing blocking it. did the run again, and same sounds occured. never has happened before. i have a cone filter in replace of the stock flat panel filter with open hood scoop. got a stromung muffler. ECU was resetted about 4 months ago. had WOT runs during the 4 months too. temperature at the tunnel last night was warmer than before, maybe mid to high 70s with about 40% humidity. anyone knows what is going on? thanks in advance.
jz
jz