after a huge back fire I wideband all sudden reads 14.8 or 14.7 all the time its never happen before with a sight back fire... my wideband is hook up to the #1 o2 wire on my AEM EMS for o2 feedback... could the be problem with my ems unit or is my wideband o2 sensor out??

 

check out post number 7 of this thread, it should answer your question