I have a 06' wrangler unlimited. Its the cylinder. I was driving down the interstate a couple days ago, and my RPMs start declining. Now I can only go about 40mph. If I floor it, it wants to bog down. I checked for a vacuum leak with break cleaner. I cant seem to find any. but I think I can hear a leak somewhere. when I limped it into a autozone, cylinder 1 had a misfire. any suggestions?
Could be a lot of things. Look at the spark plug. Is it oil-fouled or otherwise abnormal? If it looks different than it should replace it. If that is not the case or if that doesn't help, and not knowing your ability or experience working on your Jeep I would suggest taking it to a reputable technician to help with the diagnosis.
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