I have an AEM EMS and my AEM serial gauge reads an A/F ratio of 14.5 and it doesnt move. I talked to the tuner and he suggested it might be a bad 02 sensor so which o2 sensor works best with the AEM EMS and where is the best place to buy one cheap?

 

It should be a Bosch 4 wire. Have you called AEM's electronics tech support? Ky Le is very helpful there.

Kris

 

I havent called them yet. Ill call them if the 02 sensor doesnt fix things.

 

my o2 has done the same thing stuck on 14.13 ive ordered a new sensor from aem part #30-2001 should have it soon . let me know how u made out. ill do the same.