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Old 05-05-2013, 02:08 PM
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New coil

I've got a 94 yj with a 91 4.0 in it. Just replaced the stock coil with a new msd coil. It ran much smoother for a few miles then started running rough. I can smell gas in the exhaust. I'm wondering if I fowled out a plug or two. Any ideas??? Thanks in advance!

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Old 05-05-2013, 02:21 PM
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Forgot to say. Replaced cap, rotor, plugs and wires about a year ago. Have only driven it maybe 1000 miles since replacing.


Stephen

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Old 05-05-2013, 02:31 PM   #3
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Pull the plugs and look at them. Also check the spark plug gap. .035" is the correct gap unless I'm mistaken. Might want to check the found too, if it lost its good ground then that won't help he situation either.
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