thhanks for reply federalman
in the endi i changed cat dropped the readings to just above tolerance for nct/mot then i got a na cat a new 1 of ebay ( strait bolt in joby as my stock exhaust had an old 1 in there already ( fully black gunked up same as old original 4efte cat )
then i spotted i was driving around on ngk bkr7e fully fouled up but not mis firing changed them over to a 5 ( na ) she passed flying colors readings are 0.40 on low idle and 0.15 on high idle
hcc are way down to under the 50
still need to rebuild engine or