hey guys my a/f has been bouncing around at idle when car is warm. From 13-16.9 back n fourth. sometimes it will want to stall. runs normal when driving just having issues at idle. did some logs for my tuner he said the tune looks fine it's not the tune...what should I look for? I cleaned the IAC still nothing. ..
I'm running id2000 with aem v2 ems on e85

any ideas?

 

My did the exact same thing when my fuel pump failed. Can you try borrowing a friends?

 

my fuel pump is new. and car runs fine when driving just idle...

 

What aem firmware, 1v24 or 2v02? I had strange afr issues when I tried 2v02, both at idle and light cruise, and had to revert to 1v24. Solved the problem instantly, but I lost some functionality.

 

I'm not to sure...I bout the ems brand new and had it tuned in October last year..it's never been 100% where I would like it. it was idling decent for a while then now this...bad wideband? bad map sensor? guess I will look into those first.

 

Mine used to die too but ran some injector cleaner in the tank and so far it's working. It's stil idles pretty lean u less I tap the gas pedal

 

brand new id2000s as well. normal driving and under boost everything is fine

 

Mine hasn't been much better with the ID2000's. Seems some guys get them to idle clean, others are exactly like you are describing.