so my truck goes rich at idle if it sits too long idling.but i go up the rd .and it goes lean immediately i guess because the pcm tells it too go lean,idk..i sent allen a scan and he said im basically have a exhaust leak causing my o2s too go crazy. my rear02s are disabled.allen says look between the head and the o2 for exhaust leaks.that only leaves were the collector is hooked too the ball and socket.,actually no ,the front o2s are before the ball and socket .i keep getting po171 po174 codes ,he says the trims are fine but the o2s are fine as soon as im off idle.will any exhaust leak cause this ,?is it because my rears arent even plugged into anything?im lost for ideas ,ide appreciate any ideas.or suggestions .i know i have a few taps but theyre further back than the front o2s.what the hell.i did just replace my header gaskets.cmon guys i m sick of clearing codes with the interceptor gauge.im running out for a min. but i will brb.too answer any questions.thanks,i need too solve this its annoying the sht out of me .