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motomc1 09-27-2010 01:23 PM

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

p1zzaman 09-27-2010 01:30 PM

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?

motomc1 09-27-2010 06:34 PM

Thks. I actually cleaned the TB well when I had the hose off. nt

Fofo 09-28-2010 01:06 AM

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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