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Old 09-27-2010, 02:23 PM   #1
Join Date: May 2010
Posts: 29
Cold Start Problem Still

I still have have an existing small problem with my 2004 TJ 6cyl Auto (only 67k). When I first start it in the morning the jeep jumps to 1400 rpm and immediately drops to 800 rpm for 3 or 4 seconds (running rough) and levels at 1100 smooth while warming up. Only happens first start of the day. I believe it will get worse with colder weather approaching. I have replaced the TPS sensor, plugs and the IAC was spotless. Any ideas? thks

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Old 09-27-2010, 02:30 PM   #2
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Join Date: May 2010
Location: Carlsbad, CA
Posts: 227
I had a similar problem with my last truck, and it turned out to simply be a dirty throttle body. Maybe give that a look?

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Old 09-27-2010, 07:34 PM   #3
Join Date: May 2010
Posts: 29
Thks. I actually cleaned the TB well when I had the hose off. nt

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Old 09-28-2010, 02:06 AM   #4
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Join Date: Sep 2010
Location: portland or
Posts: 40
My 04 rubicon has done it since it was new. However mine gets worse when it's hot out. How cold is it where your at?
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