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Old 11-13-2005, 05:34 PM   #1
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2 SparkPlug Defoulers in O2 sensor and STILL have CEL!

I've added a second Spark Plug Defouler to my O2 sensor to bring it out of the exhaust stream, since I don't have a cat, and I STILL have a Check Engine Light!

I disconnected my battery for a while to reset the computer, but in about 19 miles, the CEL came back on.

Does anyone have any other suggestions???
This is really frustrating.
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Old 11-13-2005, 06:19 PM   #2
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The O2 foolers don't work on our cars. A couple of members have had success with an O2 sim like the one sold here.
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Old 11-13-2005, 06:28 PM   #3
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What made you think it would work......

The Casper foolers won't work, and the little extender pieces had NO chance of ever working in the first place.

The ECU tests the secondary sensor by sending a pattern of rich/lean pulses - if the pulsed results don't show up in the secondary data, it's CEL time.
Casper foolers can send a fake stream of "OK" data, but obviously can't relay any test pulses.
Plug extenders, (no matter how many used!) would have no effect, except possibly to trigger a "sensor heater failure" CEL.

S
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Old 11-13-2005, 06:31 PM   #4
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Has anyone ever read what CEL is thrown up?
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Old 11-13-2005, 10:01 PM   #5
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Quote:
Originally Posted by RX8SpdDmn
I've added a second Spark Plug Defouler to my O2 sensor to bring it out of the exhaust stream, since I don't have a cat, and I STILL have a Check Engine Light!

I disconnected my battery for a while to reset the computer, but in about 19 miles, the CEL came back on.

Does anyone have any other suggestions???
This is really frustrating.
U better ask Rotarygod & other members about this. I afraid sooner or later u'll be encountering the problem that i had right now. be4 u replace with the catless pipe, did u ever reset ECU & KAM?? disconnecting the battery won't reset those two things. Juz my 2 cents.
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Old 11-14-2005, 07:55 AM   #6
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Quote:
Originally Posted by RX8 Brunei
U better ask Rotarygod & other members about this. I afraid sooner or later u'll be encountering the problem that i had right now. be4 u replace with the catless pipe, did u ever reset ECU & KAM?? disconnecting the battery won't reset those two things. Juz my 2 cents.
No, I didn't reset those things. What would that have done and how could I do it?

Other people have had success with the spark plug defoulers, but, now I'm hearing it won't work? Is there NO way around this?
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Old 11-15-2005, 03:13 AM   #7
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you need this one instead:

Midepipe cel problem, fixed!
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Old 11-15-2005, 08:45 AM   #8
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Quote:
Originally Posted by TeamRX8
you need this one instead:

Midepipe cel problem, fixed!
Mine does the same thing, except it brings the O2 sensor out even furthur. Can you rationalize why this one would be better?
Also, the one you showed doesn't have any flats on it to tighten up to the O2 sensor with. I could see you wrenching it in (via the flats on the O2 sensor) and then trying to take it out, only to have the adapter stuck in the midpipe, at which time you'd have to grind flats on it for a wrench to grab onto.
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Old 11-15-2005, 11:22 AM   #9
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Quote:
Originally Posted by RX8SpdDmn
Mine does the same thing, except it brings the O2 sensor out even furthur. .

well apparently it doesn't and isn't. Did you follow the link to the original thread, it's not actually a positioning issue, PM the people who claim it works and see what they say, none of the naysayers have actually tried it

Solution for the CEL from Midpipes/Racepipes

Last edited by TeamRX8; 11-15-2005 at 11:29 AM.
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Old 11-15-2005, 11:22 AM
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