you had a compression test? a low cylinder will cause rough idle. of course the 5 cylinders hop around quite a lot even when running correctly. did you do the engine shocks? you need a baseline for comparison, so you need to find a grizzlled veteran who has a known sound 5 cylinder and have him/her listen and you listen to theirs and yours and see if yours is hopping excessively. of course the shutoff prob is vacuum, the above advice is good there.

good luck

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.