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Old 01-28-2012, 08:59 AM   #1
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need a little help

hello fellow jeepers i am having a problem with my 93 wrangler 4.0 one day it backfires and cuts off at around 3,000 rpm and sounds like its losing spark next day it will spit and stutter at 1,500 rpm like its not getting gas any suggestions where i should start on the repairs any help would be greatly appreciated

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Old 01-28-2012, 11:01 AM   #2
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Someone here will be able to help.

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Old 01-28-2012, 11:10 AM   #3
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Welcome, I would post the issue in the YJ tech section.
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Old 01-28-2012, 11:38 AM   #4
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Old 01-28-2012, 11:46 AM   #5
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How long has it been doing this?
Only for the latest tank of gas?
Contamination?

Does it only do it on a cold engine?
Auto choke/mixture?

Does it idle smooth?
If so, at what rpm?
Timing?

How long has it been since you had new plugs/wires?
When you look under the hood at night with all the lights out, do you see sparks jumping from leaking wires?
Misfire?
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Old 01-28-2012, 12:09 PM   #6
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Are u getting a service engine soon light? Mine was doing much the same and kept giving misfire on number one cylinder. Changed plug, wires and still same so I put in a can of sea foam into the tank... Half a tank later all is good(: no lights no bucking like a newish jeep(:
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Old 01-28-2012, 12:16 PM   #7
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Welcome aboard! When was the last time your jeep had a tune-up? Does it do it worse on cold days? wet days?
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Old 01-28-2012, 12:45 PM   #8
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Welcome. Sounds like you need plugs and wires for starters.
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Old 01-28-2012, 05:04 PM   #9
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Old 01-29-2012, 03:44 AM   #10
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Welcome and enjoy the forum!
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Old 01-29-2012, 08:15 AM   #11
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