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Old 02-08-2007, 08:24   #1 (permalink)
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OS on Mustang GT

What is the extra Oxygen Sensor on the passenger side of a 2005 Mustang GT. It would be the one in the Pipe, not the Cat. The thread must also be metric. I was going to plug it with a 3/8" pipe plug, not! I can weld it in.. Oh my EFI only has 2 on a older 5.0 They fit with some cutting because of my Shorty headers seemed a little too wide on the 5.0
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Old 02-08-2007, 20:15   #2 (permalink)
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Re: OS on Mustang GT

It don't really matter I went to the Local Muffler shop and they had a Plug for it.. cost me $7 for the silly thing but works great.

The 2005 Mustang GT H pipe was not a direct bolt up to my shorty headers the 4.6 must be about 2" wider in the block area. had to cut the pipes apart and rotate to get them to fit my Oxygen sensors under the space in front of the transmission pan..
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Old 02-08-2007, 23:32   #3 (permalink)
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Re: OS on Mustang GT

Have you moved the sensors to a different position or have you plugged the hole and are no longer using them and does your engine still run good?
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Old 02-09-2007, 07:43   #4 (permalink)
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Re: OS on Mustang GT

I put the left bank and right bank OS in the Cats and plugged the other hole. This engine only requires 2 with the 88 t-bird
EFI Engine control Setup.. Not running yet you can check my progress on the Link below..
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Old 02-09-2007, 12:33   #5 (permalink)
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Re: OS on Mustang GT

Ok thanks.

Had a good look at the pic's on the link and it's coming along good.

Just wondered how altering Oxy sensor positions may affect your engine as some are quite sensitive to different positioning as when adding headers etc and can give problems with poor idle and running.
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Old 02-09-2007, 15:00   #6 (permalink)
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Re: OS on Mustang GT

you have a good point the old locations were on the end of the Cast Iron headers just before the flange.. Never heard of putting them in the Cats. allways recommended to put them in the first three inches of the connecting pipe .. If I have a problem with them in the cats I can reweld them in the pipes.. Hope no problems.. As you can see the nice bung in the pipe will not work after I get the engine installed I should know where I can safely put them..
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