Sorry in advance for the nube ?'s Im new to this, ok I just installed a wideband A/F gage in my cobalt, and I was wondering what people are seeing as the norm for our cars because their are times when I let off the gas or am just cruzing and the A/FR jumps to 20 and after a few seconds returns to inbetween 13-16,
Do our car normaly jump to lean?

 

yes, DFCO(deceleration fuel cut off) shuts down the injectors on decel for a little. completely normal

 

assuming your mods are in your sig, and the cobalt is n/a..... why did you get a afr gauge? tune soon?

 

Going to do a supercharger build soon

 

Thanks for the info

 

Is it posible to have the DFCO(deceleration fuel cut off) romoved or dampened with a Trifecta Tune?

 

yes it is. doesn't really do anything except a **** load of popping and backfiring under deceleration and less fuel economy

 

so it would be beter to just keep it when my car gets tuned, I just want the safest A/F ratios when I go supercharged so I dont have detonation

 

Yeah, this is completely normal and acceptable. My 2.2 is supercharged and when I let off the throttle the A/F goes extremely lean (20+) and there is no detonation or risk of detonation because it is no longer under boost.

 

same here.been answered and it's normal.

 

ok thanks for all your help guys hopefully this build goes beter than my turbo build from earlier this year