Hey all, im having what i hope is easy to diagnose. Had the emission code pop up and traced it to the hose under the truck by the pump. Replaced it and cleared the code , now i am having the same hesitation but no code. Could it be the O2 sensors? When it hesitates it does it about 5 mins after starting up and only lasts about 30 to 50 secs. i can tap the gas to get it past it but it is getting me worried. It does this whether im driving or just letting it run .