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Old 08-28-2011, 06:14 PM   #1
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Default 2000 Cherokee cylinder 6 misfire HELP

Changed my plufs, the old ones were rusted and way burnt. Runs worse with the new ones in. Help me out if you can guys. Thanks
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Old 08-28-2011, 06:15 PM   #2
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Plugs*
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Old 08-28-2011, 08:22 PM   #3
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what kind u put in
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Old 08-28-2011, 08:53 PM   #4
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Distributor or not? If yes are you sure the firing order is correct?
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Old 08-28-2011, 09:05 PM   #5
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No dist. I got coil rail
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Old 08-28-2011, 09:28 PM   #6
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Any codes?
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Old 08-28-2011, 09:49 PM   #7
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Yea. Cylinder 6 misfire. Changed the plugs and now you can hear the misfire. Like its worse
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Old 08-28-2011, 09:56 PM   #8
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If this just started when you changed plugs, try swapping the plug in #6 with say #2 and see what happens.
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Old 08-28-2011, 10:26 PM   #9
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I have done that. I did that first. But its still 6. It read misfire in 6 with the old plugs and that's why I changed them. But now its worse than it was.. I can hear the misfire "tick" through my speakers. And it sputtars and putts at idle. But past 1200 rpm its smooth. ??? I dunno. Maybe injector/s. Or new coil rail. But I would think if it were the coil rail, then 5 would be bad too because they are on the same coil. I'm stumped.
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Old 08-29-2011, 07:18 AM   #10
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Try swapping the plug caps from number 6 and another cylinder. If you are hearing something through your speaker, then it sounds like an electrical short somewhere - and that would be either plug caps, plug leads, or bad coil pack.
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Old 08-29-2011, 07:24 AM   #11
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Definitely worth checking/changing injector. That was the problem in mine (same cylinder), granted mine is 13 years older, but a bad injector will cause terrible idle and smooth out at higher RPMs.
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Old 08-29-2011, 07:43 AM   #12
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Can you switch the caps on the rail? Just pop em out?
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Old 08-29-2011, 10:03 AM   #13
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ive got the same exact problem as you, cylinder 6 missfire. I have replaced plugs and even the coilpack and still nadda. Are you having issues at startup? If I try to just crank the truck it will just turn over and over until i quit. As soon as I turn the key off then turn it back over its fires right up. its 50/50 but sometimes it runs perfect others it idles like **** and just chugs until I kill it and start it back up. Im am going to try to swap the injectors this weekend. Will let you guys know.
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Old 08-29-2011, 02:42 PM   #14
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Mine fires right up but you can feel the miss. It wobbles and the tach bounces until you give it gas then its smooth. I was heading towards injectors too because if it were the coil I'd have 5 and 6 because they are the same coil.. let me know how it goes. Thanks
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Old 08-31-2011, 06:07 PM   #15
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Anything?
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