KNock Sensor
 

HEy guys, i havent posted in a while, we been driving our supra. it runs great. just a few problems. it likes to back fire after we get on it hard. and i had to bump the idle up a little bit so it would stay running. my brother broke the front knock sensor, would that cause all our problems?? if so, were can i find a cheap knock sensor. a brand new one is like 200 bucks. thanks for all the help..