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91 YJ Runs fine when cold, misses when warm
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04-16-2005, 11:28 PM
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#1 | |
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Registered User
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91 YJ Runs fine when cold, misses when warm
I recently bought a 91 YJ with a 4.0 automatic, it runs decent until warmed up, then it misses, sputters and backfires, it seems to me like a bad sensor or something, someone replaced the amp and oil pressure gauges with mechanical ones, I was hoping someone else has experienced this same problem and could help me. Thanks
Dan
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04-17-2005, 11:50 AM
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#2 |
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Registered User
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91 Yj
It also seems that the oil is getting a little gas in it, the spark plugs were really black, so it is running rich, I just need to find out why? It looks like it has a new crank sensor on it. I just gave it a complete tune up too. I just drove it down the road and back, after it runs for like 10 minutes or so it starts running rough, bucking and backfiring. It must be timing, or sensor related some how. Any ideas?
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