i have a recently revived 91 3.0 LWB that i got an emission waiver sticker for this year in PA, ...it idles high all the time, never gets below about 1200 rpm. the local chain shop couldn't figure out how to adjust it...plus the exhuast emissions are noxious, and will make me sick if i drive it for extended periods of time. not black or white or blue or anything, just smell bad and produce headaches. engine otherwise runs well and smooth, does everything it should, still getting halfway decent mpg, etc... tips? are the two problems related?

91 two-tone LWB 5-speed, sunroof, third row seat, 31" wrangler authority's on black cragar soft 8's.