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An interesting discussion on this came up on the WSJ boards today. The question was brought up which fuel are these new standards based on. Currently most automotive fuel in the US is 10% ethanol. Are the standads based on this fuel or on straight gasoline? There is a push for at least 15%...

I took a look yesterday at a couple of sites that sold Air Fuel sensors. They are all running in the $165 to $170 range regardless of make. I went with Denso because that was the OEM on my Toyota. It is not unheard of for these things to go out at faily low milage. The heater element is the...

This is the sensor in the exhaust manifold nearest the firewall. (Bank1 Sensor1) The sensor intially looks like an O2 sensor but it is actually and Air Fuel Sensor (A/F). The big difference between is the A/F runs at a much higher heater temp than the O2 sensor. This is one of the tools that...