I have posted plenty too. I get a P0171 after I disconnect the bat. It eventually turns into a P1131. Last week, I saw that a plug wire (msd) was too close to the passenger side front injector harness and corrected the burn through. I have cleaned and swapped maf's, listened to my injectors (all sound same), checked resitance at the injectors, driven with vacuum plugs on the manifold, and I still get mild surging (periodically) and a rough idle. I will swap injectors from side to side this weekend in hopes that my P1131 turns into a p1151. But in the meantime, could it really be that I have clogged or hung-up injectors that sound and measure up normal? Could the ign wire have permanently caused one to run amok? All my plugs on the passenger side get dark and sooty because the computer is trying to correct my lean condition, but shouldn't one plug look lean? My smog is now three weeks late, but I can't pass in this condition. Could there be an exhaust leak that I cannot hear? I am too old for these kinds of problems, you know! help?