Thanks Guys, dont think tappets are tight, when its not hunting it idles too well for that(owner says it runs perfectly apart from this problem), will check for corroded pins at ECU, couldnt get pin data for this one, even in 2002 book its not listed, havent done TB adaptation, can,t do it on Laser 2000 , any other way to do it?I think the new throttle body/motor was fitted in September last year, thanks for now, will keep you posted, Jim.