Bump, then misses. Please help a fellow jeeper out.
My problem started about two weeks ago. Didnt notice at first how it started,just started missing. Ive replaced the plugs,wires,cap/rotor,checked for vacuum leaks, replaced the coil and the connector at the coil. just when I think I have it fixed it starts doing it again. Missing and the Tach jumping around like crazy. Evertime it actually quits it starts right back up and it can be missing like crazy in gear and as soon as i put it in nuetral it clears right up most of the time but not all the time. Today, when I thought i had it fixed again, I took it on the highway and would run smooth till I hit a bump, then miss and come out of it till i hit the next bump and the same thing all over again. As crazy as the Tach gets, im thinking electrical, Loose wire maybe? I forgot to mention that I also changed the fuel pump and filter. I dont know where else to look. Please help! I also forgot to mention that it is a carbed 4.2 litre automatic in a 87 yj.
Last edited by Steck; 08-28-2012 at 05:07 PM.
I think youanswered your own question Miring but which one is it. I would make a list of the previous work and start there and then list all the other wires in the order of easiest to rule meaning they are readily accessable. I have not experienced what your YJ has so BUMP!
Thanks Jokerchief! This problem just makes me want to say GRRRRR!, and some other stuff. Thanks for your input of being on the right track, I ill keep looking and will post what I find out wrong with it, if I ever do that is. lol
My son had a similar problem with his jeep. He finally found the solution. It was a short in the clockspring. You can easily test this by pulling the horn relay. If the problem stops then you know it is the clockspring. This is an expensive part, but my son left the relay out and straight wired a new horn. Hope that helps.
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