I also found out the problem on my 88 3.2's idle probs were due to the DME relay. It would run poorly 2-3 minutes after cold start until slightly warm and then drop 100-200 rpms after fully warm. I mistakenly thought a bad DME would affect all operating conditions. My lesson is drop everything you are trying and do what Warren says first. I replaced plugs, wires, cap/rotor, fuel filter, etc and none were the problem although they were all orig and needed to be replaced.
Buck
88 3.2 running well...for now
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