Guys I've been having a little idle problem. For a short second im getting a drop in rpms, then it corrects itself. I'm monitoring my air fuel ratio and during that second im getting a lean spike, which I think is normal for if your cars rpms drop for a second. Any ideas?

 

need more info

anything recent?
-mods?
-significant events?

 

depends..i think its normal to get a drop in rpm if the fans kicked in?! or ac compressor worked? other than that it could be a coil. does it do that at wot?

 

when i first start my car i have to rev the engine to keep it running then when it warms up for alike 30 secs i can let out and my car will idle between 550RPM and 900RPM. when im driving and im coming to a stop and push the clutch in my car idles at 1300RPM. dunno if its suppose to be that way but the engine was just rebuilt and trans rebuilt as well