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Figured it out, was low on oil. Yup, leaking motor oil probably from the pan seal. Was low a little about a quart. 10w30 castrol syn blend went in & no longer get cel on extended idle.
I'm an idiot lol took about a month before I realized.
Things to do,
Get a spoon oil pan & OEM gasket.
Change oil & filter
Replace mishi rad cap lol its done looking @ a Spoon type F cap
* & thanks for all who helped. hate leaving threads out there without at least answering myself.