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 this cats wont last long before there fouled up to
thanks for help lads