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Message: <blockquote data-quote="fabianyee" data-source="post: 460770" data-attributes="member: 6">were u at Alexis last Sat night for Sharizan's performance??? ok, back to topic. Can be a lot of causes. Can be the coil pack having problem. Shouldn't be the plug cables if it's an intermittent problem.. Anyway, when it's idling roughly in the morning, test by removing the plug cable one by one to see if really it is running on 3 cylinder. See also whether there's oil leaked into the spark plug chambers. Can also be sticky idle control valve.or sticky AFM barn door..Time to check one by one... hopefully it's not a fried DME. Have you done any welding (exhaust, body) lately?</blockquote>