o2 sensors - JeepForum.com
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post #1 of 24 Old 09-01-2014, 12:01 AM Thread Starter
craft2004
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o2 sensors

hi guys my jeep is running lean cause I can smell it every time I get out of it and the fuel mileage has suffered also. I have changed the TPS sensor, the idle air control valve, I've cleaned the intake, changed the plugs and coil packs. it run and drives but seems to be running a little rough then when I first bought it. it has a 4.7 v8, my next move is o2 sensors. what o2 sensor are which like bank 1 sensor 1 idk which one that is. thanks

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post #2 of 24 Old 09-01-2014, 12:11 AM
jetrinka
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Is the CEL on? What proof do you have its running lean other than your highly trained nose? Smelling it is likely a rich condition.
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post #3 of 24 Old 09-01-2014, 12:37 AM Thread Starter
craft2004
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whoops I meant rich and yes the cel is on
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post #4 of 24 Old 09-01-2014, 05:43 AM
michiganmaveric
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1/1 is the drivers side pre cat sensor before the cat and 1/2 is the drivers side after the cat. 2/1, 2/2 are the ones for the passengers side.

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post #5 of 24 Old 09-01-2014, 07:53 AM
86cj74.2L
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Quote:
Originally Posted by craft2004
whoops I meant rich and yes the cel is on
What is the CEL
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post #6 of 24 Old 09-01-2014, 08:42 AM
JMZ101586
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Quote:
Originally Posted by 86cj74.2L

What is the CEL
Check
Engine
Lamp

Google is your friend.

Stable:
04 WJ Special Edition 4.7
98 Camaro SLP SS with LS2 swap
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post #7 of 24 Old 09-01-2014, 11:02 AM
jetrinka
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What code is it setting? Rich conditions are a bit harder to diagnose than lean conditions. Is it running badly?
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post #8 of 24 Old 09-01-2014, 11:49 AM
86cj74.2L
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Quote:
Originally Posted by JMZ101586
Check Engine Lamp Google is your friend.
Ok how about the P code then.......I know what it stands for..........
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post #9 of 24 Old 09-01-2014, 11:57 AM
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^^^
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post #10 of 24 Old 09-01-2014, 01:05 PM Thread Starter
craft2004
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its not running terrible but I can notice it and I still have to get the codes read. thanks for clearing up the o2 sensor info for me
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post #11 of 24 Old 09-01-2014, 02:24 PM
86cj74.2L
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Quote:
Originally Posted by craft2004
its not running terrible but I can notice it and I still have to get the codes read. thanks for clearing up the o2 sensor info for me
Just do the key dance.
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post #12 of 24 Old 09-01-2014, 02:52 PM Thread Starter
craft2004
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whats the key dance
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post #13 of 24 Old 09-01-2014, 03:28 PM
86cj74.2L
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Quote:
Originally Posted by craft2004
whats the key dance
turn on and off the ignition three times without starting it and leave on the third time.

The odometer will become your code reader.

It will flash numbers and when finished display DONE.
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post #14 of 24 Old 09-01-2014, 03:52 PM
JohnnyV
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If you smell gas it could be leaking fuel injector.

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post #15 of 24 Old 09-01-2014, 04:46 PM
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My 04 4.7 also smells like fuel from the exhaust at idle with a slight miss but no codes. I installed new plugs last Fall but not sure if I have a bad new plug or maybe coil pack? I read in the FSM the coil pack resistance is .6 - .9 ohms for primary and 6K-9K for secondary but it didn't mention exactly how you're supposed to test this? Can someone please explain this test and I am familiar with my multimeter? Thanks!

Sorry and not trying to hijack this thread but just saw o2 sensors mentioned in the title. Thought I'd mention when I bought my 4.7 exhaust from Nick/Kolak he said if you end up with a bad o2 sensor you best fix/replace it pretty fast before it trashes the cat(s).

How ya doing 86cj74.2L and glad to see you still have your sense of humor!
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