06-24-2011, 04:26 AM
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#1
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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The dme detects that there gone by reading the difference from the first set of o2s to the second set. The first set was pre cat and the second set is post cat.
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996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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06-24-2011, 05:00 AM
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#2
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Registered User
Join Date: Oct 2006
Location: New Paltz, NY 12561
Posts: 935
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Quote:
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Originally Posted by JAAY
The dme detects that there gone by reading the difference from the first set of o2s to the second set. The first set was pre cat and the second set is post cat.
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Interesting. When I installed my secondary cat delete pipes I have had no issues with CE lights. There is a O2 sensor fore and immediately aft of my primary cat. There are NO sensors around the secondary. I have passed NYS emissions with no problems for two years now and have never had a CE light come on. I have an '02 2.7 model. Keep us posted on what you find that is triggering the light.
AKL 
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'02, Arctic Silver/Graphite Gray, 2.7, TIP, 2nd cat delete, Charlie Chan muffler,de-ambered, Braille Battery, clear tailights, painted bumperettes, clear third brake light, M030 sway bars, F shock tower braces, clear rear deck, '03 side vents.  15mm spacers fore & aft.
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06-24-2011, 05:05 AM
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#3
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Registered User
Join Date: Jul 2008
Location: Conway, SC
Posts: 109
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AndyA6... you have the bypass pipes on an '04 right? The o2 sensors are on the primary cats. Adding the bypass (secondary cat delete) pipes does not effect the operation of the o2 sensors. Go by a cheap, $50 code scanner and see what comes up. I always clear the code and ignore it the first time. If it comes back, then I will see about doing something. Actually, I have cleared a code for an “aging o2 sensor” about 5 times now. I probably should do something about it.
Todd
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06-24-2011, 05:16 AM
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#4
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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Ahhhhh. Didn't realize you had a newer box. There correct. It should not affect you. Nmay e time for new sensors or and a maf
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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