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| Rigging an O2 Sensor http://4g61t.org/forum/viewtopic.php?f=17&t=8855 |
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| Author: | TylerGT [ Mon May 10, 2004 6:14 pm ] |
| Post subject: | Rigging an O2 Sensor |
Hi guys, My 4G15 ECU has been throwing the fault code "42" for over a year now, which references to "Fuel System Error", but the car is running fine. After its latest emissions inspection, hydrocarbon emmissions were 1 point below the legal limit (whew!). My first thought is that it's my O2 sensor. I tried to find a replacement through the local chain auto parts stores, but the best the guys could do for under $100 was get a 4-wire unit, and have me not hook up the heater wires. I'm not afraid to jury rig an O2 sensor to save a few bucks, but I'd like to know more about 2-wire vs 4-wire units. Any information would be appreciated. |
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| Author: | recracer [ Wed May 12, 2004 10:21 pm ] |
| Post subject: | |
Gm cars in the past used a one wire sensor. Exhaust was the ground . A two wire sensor has a wired ground. An O2 sensor starts working good around 600 degrees . To improve emissions a four wire sensor with a heater is to get it up and running sooner. In some cases running at all because how far down the exhaust stream the o2 is mounted . A four wire should work. Heating to temp is not a problem with a manifold mounted O2. |
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