Finished installing my RE-Amemiya REDOM with ID850 secondaries and a walbro 255. Upon cold start, it will idle fine around 13.5-15.2. During boost it will stay rich between 10-12, but on decel it stays lean as long as I'm off the throttle. Cruising itbwill be between 14-15 no probpem. Once it warms up, there will be times it will idle up to 16.4ishh. I'm wondering if there is something wrong or if something isn't right.

 

if you have the air pump and acv installed and working 16's at idle is about right, the air pump air is injected in front of the O2 sensor...

 

I do still have the air pump, but would also cause 16s while driving at times? There are time on light/ med throttle that I'm getting up to 16ishh