Intermittent rough idle Jeep Registry
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Intermittent rough idle

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RedBastardTJ

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Looking for some help/insight as I couldn’t find a thread about this particular issue. I have a 2005 RME TJ, 137k miles, 4.0L, auto. When I start it and it warms up it idles smooth as butter for about 4-5 seconds, then it idles rough enough to feel the vibrations through the steering wheel for 4-5 seconds and repeats. It’s not throwing any codes. I’ve changed the spark plugs, they’re at correct gap. I cleaned the throttle body and IAC. I was planning on changing the crankshaft position sensor and O2 sensors next. Any advice/probable solutions would be greatly appreciated. Thanks in advance

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