> My car still does not idle smoothly... > or rather the engine vibrates at idle. I've seen a couple of other cars (not DeLoreans) that seemed to run OK above idle even though the spark plugs wires were connected wrong. At idle the engines ran terrible. A bad battery or a bad battery ground can also cause this problem (due to a weak spark and intermittent combustion.) Above idle the alternator kicks in a bit more, and the spark becomes strong enough to smooth out the engine. Check the connection that runs through the "firewall" from the Coil box to a stud under the rear window (behind the carpeted upright panel). It has several brown wires connected to it. When I was troubleshooting an intermittent high-rpm performance problem, I found this connection loose enough to wiggle the wire eyelets around. I cleaned and tightened the connection, and the problem was cured. Please let us know what finally fixes the problem. Gary IN2TIME To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/