Update to the stumbling i am and was having for the past few months.Seems after manys searches and conversing with Grey, when i pulled my vacuum hose to the iac valve off it was not dieing.Knew even though it would run good something wasnt right.I am in the process of taking all the plumbing off and testing all valves and checking all my plastic lines for vacuum leaks.So far no leaks. When pulling the codes koeo code 111. Koer i get the 311 code.This is before i have pulled all the plumbing out and have did many searches for 311. Results for this are,(air system not working single right or rear ho2s-air injection.Wonder --- if my air pump is not fully operational and wouldnt it be working for the left side???I do belive the cross over pipes on the back are good ,rusted but hard too see and would code 311 show if its leaking. Any help appreciated . 311 Searches on Fte have resulted in vacuum lines leaks,evr being bad ---(replaced it today along with tad and tab)or fuel pressure regulator .After alot of the searches seems no one ever tells the final results for this culprit Thanks TR ALL INPUT APPRECIATED

Things i just changed---new evp valve, new tad and tab sols , fresh new spark plugs , new fuel regulator, new throttle position sensor, new iac valve -- Thanks