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Old 12-07-2009, 07:00 AM   #1
Join Date: Nov 2009
Location: hendersonville NC
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help...won't start

HI, just got a YJ recently a 92 w/ 4.0 auto. everything is it , but it was getting real bad gas milage. So I changed the plugs and put in a new O2 sensor (disconet the battery first) and now it won't start. cranks, but won't start and the check engine light comes

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Old 12-07-2009, 09:16 AM   #2

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1st check firing order with the plugs and wires... easy to put one to the wrong plug when changing.

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Old 12-07-2009, 04:26 PM   #3
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yeah or u can do like i did and bend the plug arm when u try and put in the last plug next to the fire wall. boy did i feel retarded, but yeah any way just start by checking wires. and then start pulling plugs one at a time and make sure you didnt bend an arm by mistake.
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its a jeep thing u wouldn't understand
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