i was going threw the vendor index looking for stuff for my car . i got on moddern performance and came across some thing called APEXI S-AFC NEO??? its under the electronics section. any one kno wut it does and if anyone has it in there car let me kno.

 

it lets you adjust fuel to fix your AFR's, also measures voltages and a ton of other things

i used to have one for my Nissan 200sx, not too sure how useful it is for Cobalts, but it works almost like a stand-alone engine management as far as fuel ratios go

 

thanks!!!