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12-08-2007, 02:49 AM
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#1 | |
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Registered User
1989 YJ Wrangler
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o-2 senser
could the o-2 senser be whats making my sons 90 4.0 be gassy and foul plugs? how do you check one to find out if its bad?
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12-08-2007, 02:54 AM
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#2 |
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The Guru of Nothing
 
1999 XJ Cherokee
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is it throwing a code?
-Kyle
__________________
North Bay, CA Jeepers Post Here My Build Thread ~My Write Ups~ It's Not Just a Jeep, It's a Lifestyle
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12-08-2007, 06:48 AM
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#3 |
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It's the crank sensor!
 
1999 XJ Cherokee
Join Date: Nov 2007
Location: Central Minnesota, MN
Posts: 6,793
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Probably not. The oxygen sensor is a trim device and what you are describing sounds a little heavier than what a trim device could be responsible for. How many miles on the vehicle? How many miles on the spark plugs? Basic things first.
__________________
99 Cherokee, 4.0 AW4, NP242 Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche Without "data", all you have is an opinion! |
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12-08-2007, 09:03 AM
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#4 | ||
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Web Wheeler
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Quote:
Quote:
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12-09-2007, 09:13 AM
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#5 |
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Registered User
1989 YJ Wrangler
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lots of miles but new plugs but it fouls them. how do i check for codes?
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12-09-2007, 09:40 AM
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#6 | |
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Web Wheeler
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Quote:
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