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Tow Rigs and Trailers Hey, not all of our Jeeps are great on the highway. Post here for tech related to getting your XJ to the trailhead.

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Old August 16th, 2007, 19:04
jacdu jacdu is offline
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Rough idle 88 cherokee

I'm new to new group. A question on my son's 88 cherokee. It has a rough idle, new plugs, cap&rotor, o2 sensor. Checked for vacuum leaks to no avail. Is there a way to read the trouble codes without a code reader. It's the 4 liter six

Thanks, Jack
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Old August 16th, 2007, 19:08
dj's 2000 xj's Avatar
dj's 2000 xj dj's 2000 xj is offline
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Re: Rough idle 88 cherokee

I had the same thing on my 88. I did the cap, rotor, plugs, wires. Then I bought some seafoam. Seafoam worked great, now getting around 20 mpg on good days. Try a search on seafoam.
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