Hey guys, any ideas on this one.......runs rich ....at about 8% CO will fluctuate, from 5% to 8% , but starts off lean and gets worse on warm up, at times it will fluctuate an idle and at that point is when it drops dramatically, but will catch itself on 5% and rise back up as if it thinks that 5% is 1% or somehting.......

have changed:& checked
o2,  AFM, distributer, coil, coolant temp II sensor, fuel pressure reg, intake manifold boots, grounds, ECU, hall sensor, hoses, etc

we can't think of anything else....although is it possible that thte CAT could be causing this, or a faulty wire in some wiring harness...if so does anyone know what wire it could be??!! I was think the CAT, cause maybe from it running rich theres excess fuel in there that gets worse on warm up or something....

please help,
thanx,
Tracy
85' GL "Ripple"
65" Splitty