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There is a TSB covering 3.5L engines built before Feb. 17, 1995 that deals with no cold starts below 0 degrees. It involves using only Champion RC-12-LYC plugs gapped to .035", the use of 5W-30 oil and a reflash of the PCM to the latest software. The TSB# is 18-15-95. I had a cold start problem with my 95 LHS two yrs.ago and have had the TSB fix done. The weather in Chicago has not been
all that cold this winter so I don't know if the fix works but the car does seem to be leaner when cold but is OK when warmed up. It would flood in the cold before the change.

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