new to site any help welcome. have a 95 must that thinks its running lean. smoke tested and fixed all vacuum leaks, new maf, replaced 1 o2 sensor that was sticking, cleaned throttle plates, new plugs. o2 staying around 20 at idle with little change, maf at .7, and injectors 3.6- 4.0. drilled whole in exhaust to relieve pressure if cat was bad no change. can unplug maf and it runs good and o2 sensors jump high and check engine light does come on. KOER test passes, KOEO passes. according to computer it has 6.4 volt reference, little high but the cause? also ended up changing icm and pick up. fuel pressure and volume are good