I need to replace heated oxygen sensors on my 1994 Toyota truck. I found the one right before the cat. converter, however I am unable to find the other one. I need to replace them so I can pass smog test. I need to try to do this myself.

i have a 1989 toyota truck 22re while crossin creek the truck starts to sputter. i have changed distributor cap, spark plug wires and also have put plastic bag over distributor. ihave got a water hose and sprayed the engine to find out what is causing the sputter.but i cant get it to skip a [...]