1995 SR5 4Runner 185k miles... I'm redoing the top end, and have read that it's good to replace the knock sensor wire. OK, that's fine...only $13 or so. Is it really worth while to change the knock sensor too at $150? That's just crazy! Is there a way to test it? How long do these things normally last? Thanks, Brian

 

its a simple ohm test from what i remember.

dont have the specs but you could find them in the online FSM
http://personal.utulsa.edu/~nathan-buchanan/93fsm/

 

According to my manual there should be infinite resistance between the sensor terminal and housing, if not it should be replaced.

 

Has anyone ever had a knock sensor go out on them???

 

Yeup... two of them, within a month of one-another.

Big babble over here: https://www.yotatech.com/forums/f2/cel-code-p0330-saga-56080/


In that reading, note how I ended up dealing with the 2nd sensor...

I wired them together.

Not really recommended, but I've been running like that for a LONG time, and it's "fine".