How do I check the 02 sensor in my 88 4runner, I have an 86 FSM and it shows to test it with the connectors under the hood, but I don't have these connectors, also my 02 sensor is in the exhaust before the cat not in the exhaust manifold. Any help would be great!

 

bump?

 

you don't have the connector's under your hood, or you don't have what plugs into it?

 

well, some of the stuff on the electronics changed between 86 and 88 so, you'd need to reference an 88-95 manual.
try this: http://personal.utulsa.edu/~nathan-b...42oxygense.pdf

 

Thank you thats exactly what I needed, will test it tomorrow!