yesterday my car mysteriously started feeling sluggish. When i glanced @ my vafc i noticed when i was @ full throttle the vafc was only readoing like 85-90% (this is with the car running) when i shut the car off and depressed the gas pedal the vafc read correctly 100% throttle. i checked my check engine codes but it is only throwing code 23 which is knock sensor because i am running a lsvtec on an obd2 ecu. any theries as to what might be going on??? i have reset the ecu, disconnected and reconnected the battery thinkning it would help but nothing. i am running a zex no2 kit which reads off the tps but i even un hooked it to see if it made a change but still nothing please help