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Regarding a 99 L36 with a 4 wire o2 sensor, which wire sends a signal to the computer? I found 2 brown wires, 1 white and 1 purple wire. I bought a cheap sunpro A/F gauge, which is supposed to take its signal from th stock 02 sensor via piggyback wire clamp. I clamped the gauge to the purlple sensor wire, and it gives me crazy readings. Does anyone know which of the 4 wires is the correct one, or do I have to try all 4 and butcher the harness?
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1999 red camaro v6 M5: with a turbo<br />13.52@107.99<br />No, seriously: Who Farted? <br /><a href=\"http://www.cardomain.com/memberpage/600086\" target=\"_blank\">http://www.cardomain.com/memberpage/600086</a> -
Crazy readings maybe, but it will be crazy at idle, afaik. Reads only correct during throttle stuff -- accurate at WOT, roughly.
But maybe i'm wrong. But hey, you're on the right track. Hooray for gauges. [img]smile.gif[/img] (I've got a few)
-Rob<b>97 Camaro 3.8L M5</b><br />Car for sale<a href=\"http://terpmotors.com\" target=\"_blank\">terpmotors.com</a> Terrapin Motorsports! UMCP -
The gauge varies wildly (Full rich to full lean) during all operations except WOT, where it reads slightly rich. If I do have the right wire, then I have a sloppy computer. I thought it would be more accurate.1999 red camaro v6 M5: with a turbo<br />13.52@107.99<br />No, seriously: Who Farted? <br /><a href=\"http://www.cardomain.com/memberpage/600086\" target=\"_blank\">http://www.cardomain.com/memberpage/600086</a>Comment
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Nope, that's exactly what the gauge does.
Our cars (and most) have narrow band O2 sensors which don't read a/f ratio well. That's why when you get a dyno with wideband they hook up their own O2 sensor.
Basically the gauge is good for nothing more then a pretty light show. I know b/c I have one.
Chris<b>2002 BSM TransAm WS.6 M6</b><br /><b>350rwhp, 365rwtq</b><br /><b>Stock:</b>13.455 @ 105.39 2.129 60\'<br /><b>Mod:</b>12.449 @ 113 1.832 60\'<br /><br /><b>2004 QSM GTO M6</b><br /><b>303rwhp, 329rwtq</b><br />Stock: 13.74 @ 102.14 2.1 60\'<br /><br /> <a href=\"http://members.cardomain.com/silvertaws6\" target=\"_blank\">http://members.cardomain.com/silvertaws6</a> <br /><br /><b>1984 Firebird S/E M5</b><br />2.8LComment
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