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  #1  
Old 10-03-2010, 11:15 AM
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Question Air/fuel ratio gauge install-wiring question

Hi, I am really interested in adding a a-pillar dual gauge pod to my WJ. So far I am planing to have a air/fuel ratio gauge and a EGT gauge. So my question is does anybody know how exactly the a/f gauge should be wired. I've had a similar setup in my old ride but back then my mechanic just told me in which wire to tap in. Unfortunately he's not around anymore so I'll need some help on that. Thanks a lot
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Old 10-03-2010, 11:28 AM
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Re: Air/fuel ratio gauge install-wiring question

There's no wire to "tap in" to. If he's talking about tapping into a wire then he's talking about tapping into the O2 which will read narrowband. You need to buy a wideband setup. You will weld a new bung into the exhaust near the collector, screw in the new wideband O2 sensor, wire it up and hook it to the new gauge. It's pretty easy. There's only basically a power and a ground to hook up and plug the wire to the gauge.
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  #3  
Old 10-03-2010, 11:52 AM
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Re: Air/fuel ratio gauge install-wiring question

Thanks for the fast response. I forgot to say that my old car was a '94 so all I had to do is tap into a wire. This one sounds very complicated. Can you explain the "weld a new bung into the exhaust near the collector" part.
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Old 10-03-2010, 12:12 PM
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Re: Air/fuel ratio gauge install-wiring question

A bung is what the new O2 sensor screws into. Here's a few pics. In your 94 you were still tapping into a narrowband. No car comes factory with a wideband sensor. Narrowband read 0-1V. Wideband reads 0-5V.



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NA Uncorrected... 11.84@114 1.63 60' Best 60' 1.62
Best Turbo Uncorrected.... 10.51@131 1.53 60'
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  #5  
Old 10-03-2010, 12:13 PM
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Re: Air/fuel ratio gauge install-wiring question

It's not complicated at all..... just sounds complicated. Any muffler shop can weld the bung in for you.
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Best Turbo Uncorrected.... 10.51@131 1.53 60'
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  #6  
Old 10-03-2010, 12:26 PM
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Re: Air/fuel ratio gauge install-wiring question

So basically no matter what I do i have to get the wide-band set up.Any chance I can use whats already in the Jeep?
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Old 10-03-2010, 12:39 PM
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Re: Air/fuel ratio gauge install-wiring question

No..... you can not use what's in the Jeep. The stock is narrowband. A narrowband O2 sensor can not read wideband. Wideband kits range from $200-300. Why risk your engine on trying to use the wrong thing?
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NA Uncorrected... 11.84@114 1.63 60' Best 60' 1.62
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  #8  
Old 10-03-2010, 01:04 PM
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Re: Air/fuel ratio gauge install-wiring question

I was planing to use the gauge only to display the ratio not to tweak the engine. this is turning to be a project bigger than I wanted but I'll work on it regardless.


Now I have another question: How hard is it to install a transmission temp. gauge(mainly the sending unit)?
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Old 10-03-2010, 01:13 PM
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Re: Air/fuel ratio gauge install-wiring question

What year and what motor Jeep do you have? You may as well buy a MSD Dash Hawk. It will display tranny temp for you and it just plugs into the OBD-II port.
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2007 SRT8 GC Turbo.... http://community.webshots.com/user/1SickHarley
Best time so far.
NA Uncorrected... 11.84@114 1.63 60' Best 60' 1.62
Best Turbo Uncorrected.... 10.51@131 1.53 60'
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  #10  
Old 10-03-2010, 01:16 PM
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Re: Air/fuel ratio gauge install-wiring question

Its a 2004 GC Laredo
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Old 10-03-2010, 01:20 PM
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Re: Air/fuel ratio gauge install-wiring question

What engine?
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2007 SRT8 GC Turbo.... http://community.webshots.com/user/1SickHarley
Best time so far.
NA Uncorrected... 11.84@114 1.63 60' Best 60' 1.62
Best Turbo Uncorrected.... 10.51@131 1.53 60'
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  #12  
Old 10-03-2010, 01:36 PM
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Re: Air/fuel ratio gauge install-wiring question

it has the 4.0l I6 in it
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