Originally Posted by sx261

well i also hear a hissing sound... at first i thought it might just be the custom headers/straight pipe that came with the car when i bought it... my idle is normal its just that sometimes.. and not that often actually... that it kinda start fluctuating... at first i thought it might be the maf sensor? maybe not letting the ecu know how much gas to send? but idk cuz i remember fixing a family member's Camry lol and i fixed a similar issue by cleaning out the air temp sensor. so yeah idk... kinda clueless to what this might be