Re: ITB Conversion on sixteen valve 4AGE On my inventory bigport AW11 a leaking exhaust manifold gasket caused the O2 sensor to read lean and it pumped gas into the motor. Fuel economic climate plummeted until I sorted it out. Customer gratification is taken pretty seriously and a full defect/ https://louiskkkjh.oblogation.com/33752890/a-simple-key-for-4age-20v-itb-unveiled