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Old 09-07-2003, 11:06 PM   #1
Keith Cournoyer
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Member#: 16764
Join Date: Mar 2002
Location: Somerville, MA
Default O2 sensor in MRT Header

Hi Folks,

I have a question for those of you who have the MRT Header on there RS:

For the 2nd O2 sensor, what is everyone doing for lengthening it to make it long enough to fit?

The reason I ask is that I spliced my old O2 sensor to a new one I purchased. It worked for a while, but recently I have being pulling a trouble code that says the 2nd O2 sensor is not functioning. I am wondering what my options are for fixing this problem? I need to get an inspection soon and need to act soon. Thanks in advance to any help or suggestions!

Keith
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Old 09-08-2003, 02:00 AM   #2
obyone
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I had the shop lengthen the O2 sensor wires, when they installed my MRT system, but I've heard that there is a plastic quick zip/wire tie that can be removed to give you the extra length. The wire tie is pretty far on the engine so you'll have to follow the wires to find it.

If you lengthen the wire, get some good quality connectors. I've also heard that the wires used for the O2 sensor are coated to protect against the elements, thus they cannot be soldered correctly.
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Old 09-08-2003, 12:06 PM   #3
kickin_81
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Yup! The bundle is tied under the area of the airbox. Just follow it, and you'll find it in no time. I actually had my brother help me, so he was the one who untied it. He didn't use any tools to untie it, so it should be fine by yourself (assuming you have the car secured on jack stands/ramps/raised). Have fun with the better pull.
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Old 09-08-2003, 12:58 PM   #4
m750
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I've got an 01, and my CEL has been on since I installed my MRT. People are right, you do have to release that one wire from the bundle in order to have enought slack in the line to attach the 02 sensor. Good luck, I've since bought a pony express mil eliminator, but I've yet to install it.
AO
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Old 09-08-2003, 03:42 PM   #5
Jard
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Does the 02+ model year have the extra wire available to connect the second 02 sensor? I have a constant CEL from TWE headers and hi-flo cat that I would like to go away.
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Old 09-08-2003, 05:38 PM   #6
Keith Cournoyer
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Default 2nd O2 sensor

Thank for the info everyone. I have had the header on for a while now, yes it pulls nicely! I too have the Pony express eliminator but need to get a new O2 sensor first before installing it. Does anyone have any experience with non-OEM oxygen sensors? I know they're a little less expensive.
Keith
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Old 09-09-2003, 02:53 AM   #7
Andrew Bacon
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Quote:
Originally posted by obyone
.....the wires used for the O2 sensor are coated to protect against the elements, thus they cannot be soldered correctly.
Enameled wire can be soldered if you use a broad tip, 800+ degrees. You just have to cook it with the iron for a few seconds more than normal to burn off the enamel.
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