ok i had autozone check the CELs and it came back saying speed sensor, and o2 sensors. but i went ahead and replace IACV with one i had laying around. it helped a little bit but still wants to idle around 300 or so. the needle is just above the 0 on the stock tach. my autometer tach i cant tell cause it jumps too bad when its that low. but this idle bump is what has me stuck. if i barley prress the gas to 1500 it bumps to 1500 and 1600. i just noticed to that when i rev it past 1500 like 2 or 3 grand or so when it revs back down exatly to the spot where it bumps it will pop or backfire not loud just no matter where i rev it to on the way back down every time when the needle hits that spot it will do it. almost sounds like it is shutting off but comes back in a spilt second. anyone have a problem like this? i had eg coupe with a z6 the would do the same thing but it would do this bump at idle, not like this when i have to barley give it gas