I just changed the plugs and wires on my 2006 T&C 3.3liter because it was sputtering above 3000 rpm (I suspected a misfire). Now the van is idling @ about 1500rpm in park and still above 1000 in gear. The salesman said the plugs were pre-gapped and they all looked fine before I installed. Plus the engine still sputters when I rev to above 3000 RPM.
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2006 Chrysler Town & Country Question: T&C 2006 idling high
Answer #1patrick mannion from Greg Solow's Engine Room, May 25, 2009, 11:07Master
I am not very familiar with Chrysler but have worked on a few T&C. Was the idle speed high prior to replacing the spark plugs and wires? If so I wonder if a small vacuum hose has been knocked off and the engine's control computer is compensating. The spark plug gap won't cause the high idle.
Has the Check Engine Light/Service Engine Soon Light come on? If so plugging in a scan tool to the diagnostic socket under the dash may pinpoint the source of the problem quickly. I wonder if disconnecting the battery for five minutes and then reconnecting the battery and allowing the engine to relearn its idle strategy. On both the 3.3L and 3.8L engine the idle speed is electronically controlled by the idle air control motor located on the throttle housing.
Ensure the throttle cable was not disturbed or "tweeked" during the spark plug replacement.
ReplyVisitor, November 28, 2010, 11:59
I have exactly the same problem with my 3.8L T&C. I felt a bit of hesitation when driving the car which I only do once in a while because it's my wife's car. Anyway, when I was in park and brought it to about 3000 rpm it began to sputter and had a hard time going over that at all. When this happened I presumed some sort of cut in a spark plug wire and it was arcing. I changed them all including wires and it still sputters. I disconnected the battery and reconnected it. Not sure if it was exactly 5 minutes but it was still there after doing that. Any other thoughts?
ReplyVisitor, December 30, 2010, 18:53
mine does this also. The dealer has replaced sensors, plugs & it still does it, they have no idea what the problem is. It has cost me alot of money and I still have the same problem