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Jeep Wrangler YJ
YJ General Discussion
Engine starts easy but runs rough.
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<blockquote data-quote="Tree top flyer" data-source="post: 437409" data-attributes="member: 19660"><p>I have a 1989 YJ with a 4.2L engine. In the early morning , it starts easy and the RPM's come up right away. But after a minute, it idles so rough, it sounds like it is firing on only 4 cylinders.</p><p>After it gets up to temp. (approx. 170-180), it runs fairly decent, starting out, and fine at higher speeds. At stop lights, if idles rough, and after stopping, it restarts hard, and requires multiple cranking efforts. I have replaced the plugs, reset the timing, and adjusted the idle down to a lower RPM. It has an MSD ignition and a Clifford Performance intake and Weber Carb, with Clifford headers and a mild Howard Cam. I can't find the problem. Help!!</p></blockquote><p></p>
[QUOTE="Tree top flyer, post: 437409, member: 19660"] I have a 1989 YJ with a 4.2L engine. In the early morning , it starts easy and the RPM's come up right away. But after a minute, it idles so rough, it sounds like it is firing on only 4 cylinders. After it gets up to temp. (approx. 170-180), it runs fairly decent, starting out, and fine at higher speeds. At stop lights, if idles rough, and after stopping, it restarts hard, and requires multiple cranking efforts. I have replaced the plugs, reset the timing, and adjusted the idle down to a lower RPM. It has an MSD ignition and a Clifford Performance intake and Weber Carb, with Clifford headers and a mild Howard Cam. I can't find the problem. Help!! [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Engine starts easy but runs rough.
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