Hey guys new here not really sure how to use this site so sorry if I'm not posting in the correct place.

2006 cobalt ss/sc

Little background since I have had the car it has been idle hunting. I have replaced the biggest portion of vaccum lines. changed the maf sensor. had a crank sensor relearn. car was running too lean at first got that issue fixed. Now I'm running too rich bank 1 forgot the code. Changed the bypass/supercharger solienod BC it was throwing a code. Finally got the car to not having a check engine light since ownership then this started 😌. also changed the map sensor as well. Going to change fuel filter next week just as matenice because I've never done it since I've owned it . also changed the plugs to NGK v power part # 6962 gapped on 35. MODS zzp 2.9 pulley #60 injectors injen cold air intake clutchmaster stage 2 clutch. Car was supposed to have been tuned by prev owner with HP tuners

 

You changed the sensors but have you checked the TB at all? Could be caked with carbon which could also cause issues, especially with idle

 

I actually forgot to mention in the post that I cleaned it with throttle body cleaner it was a little dirty but not neglected. Didnt change my symptoms at all.

 

Might have a vacuum leak then somewhere yet then despite the majority of changes. Do you have a OBDII module to check the exact codes you're getting?

 

Yeah I do. But no codes

 

If you fixed all that and aren't throwing any codes it could very likely be your tune that needs adjusted. If your MAF is reading slightly different than when it was tuned that would be enough to throw off your fueling.