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Originally Posted by t walgamuth
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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Thanks Tom. I regret working two problems into one post.
I am afraid the rough idle may be a bad cylinder as I DID replace the engine shocks, and everything else mentioned. The only thing I've read on these forums that hasn't been done is timing chain check and a compression test. Starting it right up, everything is fine, even with AC on. But run it for 10 minutes in this Florida heat so the engine warms up and I have to drop to N every stoplight lest I'm doing the Panzer Boogie. Also I drove my mechanic's station wagon for a few days while he replaced the AC last year and it had twice the mileage and idled like a champ.
The weird thing is I got 23.7 MPG before I replaced the injectors, driving in the city (no AC, optimal driving conditions to-from work at 45mph) a few months ago. I cannot imagine a cylinder is bad if I"m getting sticker mileage.
