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10-17-2012, 09:51 PM | #23 |
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The length was close but doable, no doubt. I did the welding and fab myself, and I take my time and "do it right" per many hours of research. (All SS bungs / fittings / filler rod too!)
Yes, I have an OBDII scanner and it's clear. |
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10-17-2012, 10:27 PM | #24 | |
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Look in crfine88's build thread. He actually explains how he built extenders, best solution IMO. Your other option is to buy euro O2s (which are longer), but you need to get those from europe and they're expensive.
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10-18-2012, 12:10 AM | #25 | |
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But there was a definite change in the way the car pulls from 4500rpm++ when I got the tune (on top of headers). Cracks open so to speak. AJ @ ESS is a master IMO |
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10-18-2012, 06:54 AM | #26 |
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OP,
Microscopic leaks can cause O2 sensor voltage to go low. These are usaully found at the bung welds. If your voltage is too high I suspect a failed sensor or wiring issue.
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10-18-2012, 06:59 AM | #27 |
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Thanks for your input confirming my hunch.
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03-30-2013, 06:55 PM | #28 |
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Update: after a few times clearing the codes, my codes disappeared and I was able to pass state inspection today. Without getting too much ahead of myself, I think my car learned how to "fix" itself. Bow down to German engineering!!!
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03-30-2013, 07:35 PM | #29 |
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04-01-2013, 11:12 PM | #30 | |
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Last night I replaced both of my O2 Sensors after cutting the original ones to extend them to the back on the section 1 . However, I didn't clear the code, I'm hoping the car will noticed the change and turn off the SES light. |
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04-02-2013, 12:50 PM | #31 | |
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The trouble I was having initially was that as soon as my monitors would become ready, the SES or the pending fault would come back. I think overall it took my 4-5 cycles to get rid of it. Mind you, I did the O2 relocation in October/November and my car has been in the garage most of the winter and it was driven once every few weeks.
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04-02-2013, 01:30 PM | #32 |
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Not to be the bearer of bad news, but make sure you put it on a dyno that can read AFR. You need to make sure things are actually ok, and not that the car adapted to the bad conditions, giving you lower than expected performance.
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Last edited by beta; 04-02-2013 at 02:30 PM.. |
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04-02-2013, 02:05 PM | #33 |
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Just wondering, how would a bad rear O2 sensor decrease performance?
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04-02-2013, 02:35 PM | #34 |
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Read this excellent PDF I found on the m5 board. At the very end of the document it goes into the rear O2s.
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04-02-2013, 08:35 PM | #35 |
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Interesting. Thanks for sharing
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