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!
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.