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Bill
New User
| Posts: 10
| Joined: 12/03
Posted: 12/27/03
12:07 AM
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I've been having an on going problem for the past two winters that I can't seem to solve and was hoping someone might have a solution.
Last winter my 2000 TJ (6 cyl 4.0 ltr) developed a misfire in cyl's 1 and 3, this only occurs randomly during idle and only during the winter months. I replace the plugs last winter, which seemed to reduce the problem for a while.
It ran all summer without a problem but here I am again this winter with the same problem. I replaced the plugs again with OEM and the spark rail as well but I'm still getting a MIL code. Most of the time when I get a MIL code it's cyl 1, but occasionally it gives me a multiple cyl misfire in cyl's 1 and 3 and yesterday it gave me cyl 4 for the first time.
I'm looking for suggestions as to what might be causing the misfire? My TJ has a spark rail that shares 1 coil for 2 cylinders, so I don't have the issues normally related to bad wires or a bad distributor, and as I said it only happens during the winter months and at idle. She has 120,000 miles on her and I was wondering if it might be valves? This is driving me nuts and having limited funds right now I don't have the luxury of going to a shop and have them diagnose the problem. So if anyone has any suggestion as to what I can check I'd really appreciate it.
FYI, it's recently developed a slight engine knock during acceleration which I don't seem to have if I run 93 octane gas, don't know if it's related but I thought I'd mention it.
Thanks to all and hope to see you all at the holiday party.
Bill Lang.
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PeteBarton
Enthusiast
| Posts: 433
| Joined: 08/03
Posted: 12/27/03
05:15 AM
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There is a recall for this problem. The TSB number is listed below. A dealer should at least be able to tell you what the problem is.
18-013-01 JUN 01 PCM - Rough Engine Idle/MIL ON
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Bill
New User
| Posts: 10
| Joined: 12/03
Posted: 01/09/04
10:37 PM
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Hello Pete,
Just wanted to let you know that I checked the TSB you recomened for the winter misfire, went to my dealer had them update the softwear at a cost of $41.00 and BINGO! problem solved.
I can't thank you enough for your email, you probably save me a few hundred dollars at a time when money is short.
It's nice to know that I'm involved in a sport where wonderful people are are willing to help a total stranger. I can't stress enough how much I appreciate your help. I've actually passed the info on the several other wheelers that were having the same problem, I just hope it helps them as much as you have helped me.
With warmest regards,
Bill Lang, Jr.
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