Sorry, I don't have the cable that works with the 95's.
My first guess would be the o2's. When cold the ECM doesn't use them. 2nd guess EGR sticking. Fairly common problem, but that should throw a code.
Ruff idle, when was the last tune up? Plugs, wires, PCV???
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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