o2 sensors

[William Magliocco]

Ben, I hate to nitpick, but:

1)  removing the signal lead connection from an O2 sensor puts the car back into an open loop condition...

2)  the major difference between sensors:

All have One signal lead

3 wire sensors have the 2 additional wires for a HEATER, which makes the o2 sensor give meaningful readings faster.  Thank the feds for this feature.

4 wire sensor add an additional wire for a signal ground

I agree with you, Ben, that O2 sensors can get sloppy or slow and it won't throw a code when this happens.