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Band.
Join Date: Dec 2003
Location: Denver, CO
Posts: 13,322
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Unplug the oxygen sensor when setting CO%?
Sorry for the stupid question. I've been reading for an hour and haven't found enough answers to be comfortable.
If I'm checking my CO% on my CIS car, do I unhook the o2 sensor first? Like this? 1. Unhook o2 sensor. 2. Set mixture to about 3 - 3.5% CO. 3. Reconnect o2 sensor and watch it lean out to .5 or something. No, I don't have a cat. I do understand the arguments for leaving the o2 sensor disconnected, but I think I'd like to have it in the loop. Thanks  edit: I just looked in my Haynes and it says to unhook o2 Sensor and get a reading of .4 to .8 (USA) 1.0 to 2.0 (UK) arrrrgh someone enlighten me. Thanks
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1983 SC Coupe 1963 BMW R60/2 1972 Triumph Tiger 1995 Triumph Daytona SuperIII Last edited by Gogar; 03-15-2008 at 09:12 AM.. |
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03-15-2008, 09:02 AM
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Registered
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sub'd. Are you using a Gunson Jeremy?
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Shane - 1984 928S |
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03-15-2008, 10:39 AM
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Band.
Join Date: Dec 2003
Location: Denver, CO
Posts: 13,322
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Hi Shane.
My friend who's also a mechanic has a nice gas tester and some lifts in his shop behind his house. (SWEET) Finding good lift points was a PITA, but worth it. The Haynes manual states .4 to .8 CO% with the oxygen sensor unplugged. (USA) It also states 1.0% to 2.0% (UK), with "air pump disconnected". We just screwed around for a while and finally settled on it at about 1.7-2.0%, with the oxygen sensor disconnected. If I wanna change it, I have easy access to the tester. I also want to see if a richer mixture will cool my engine down. We hooked the oxygen sensor back up, with NO CHANGE. So, I'm assuming that my oxygen sensor is toast (86K miles) or has a bad connection. (the little ceramic connector in the engine bay is broken as well.) Anyone?
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1983 SC Coupe 1963 BMW R60/2 1972 Triumph Tiger 1995 Triumph Daytona SuperIII Last edited by Gogar; 03-15-2008 at 01:52 PM.. |
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03-15-2008, 01:47 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,431
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the 3.5% setting is if you want to run with the O2 sensor disconnected. set it around 1%, unplugged, if you want to run with the O2 connected. the O2 puts it where it wants anyway, but you tend to feel less of that light repetitive surging from the O2 sensor correcting the mixture if it's set on the lean side initially.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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03-15-2008, 03:05 PM
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Registered
Join Date: May 2005
Location: Cridersville, OH
Posts: 1,879
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Jeremy, When using the lift get you 4 hockey pucks to help spread the load. One on each corner.
Surely you can find some used ones in your area. LOL.
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75 911 Indian Red- RUFWAN2B 2000 Boxster 2000 & 2007 Dobies www.stahlwerks.com Cages and preparation for your Porsche “People who never make mistakes must get tired of doing nothing” Bill : The origin of the orgy of Porsche |
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03-15-2008, 03:12 PM
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Band.
Join Date: Dec 2003
Location: Denver, CO
Posts: 13,322
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You're killin me Duke. What's a hockey puck? Oh, you mean like an Egg McMuffin at the airport?
Thanks JW.
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1983 SC Coupe 1963 BMW R60/2 1972 Triumph Tiger 1995 Triumph Daytona SuperIII |
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03-15-2008, 04:09 PM
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