Autometer A/F
09-12-2003, 03:58 PM
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No, there is nothing else you need. The instructions are very clear and correct - I had no problems. You may see some feedback flow in here that says the A/F meter is a gimmick or toy... well, it's true. But, it's neat toy 
Go the extra mile and connect the ground directly to the battery (and the power, too). This will minimize charge and ground errors. I ran a ground wire direct from the body of the sensor to the battery also - this really doesn't do much, but it helps reduce the variable resistance seen by the O2 sensor body being grounded only to the exhaust - the exhaust changes impedance with heat variations.
The reason being that the O2 sensor is not sensitive enough to give true and useful readings (and, it doesn't log the data for analysis) - for that you need wideband O2 and better monitoring equipment... cost is outrageous. There are DIY alternatives, but it's not plug-n-play and I've heard good and bad about them. A four wire sensor is better than 3, but still not nearly the holy grail of O2 monitoring.
At best, the sensor will tell you if something is grossly out of sorts. The dithering is normal until you are at or near full throttle above ~3k RPM.
Good Luck!
Go the extra mile and connect the ground directly to the battery (and the power, too). This will minimize charge and ground errors. I ran a ground wire direct from the body of the sensor to the battery also - this really doesn't do much, but it helps reduce the variable resistance seen by the O2 sensor body being grounded only to the exhaust - the exhaust changes impedance with heat variations.
The reason being that the O2 sensor is not sensitive enough to give true and useful readings (and, it doesn't log the data for analysis) - for that you need wideband O2 and better monitoring equipment... cost is outrageous. There are DIY alternatives, but it's not plug-n-play and I've heard good and bad about them. A four wire sensor is better than 3, but still not nearly the holy grail of O2 monitoring.
At best, the sensor will tell you if something is grossly out of sorts. The dithering is normal until you are at or near full throttle above ~3k RPM.
Good Luck!
09-12-2003, 04:58 PM
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I installed one on mine with the extra hoops for the wiring also and it's been a help to tune my management system although like Skip said, it's for general ideas and not fine tuning. Trying to watch the O2 numbers on the screen is hard because they bounce so much whereas a visual guage is easier to get an idea from.