1987 supra 7mge Code 52 and 51

[jetjock]

Beliefs can impair judgment. For example believing you understand how a thing works, wiring is good, parts are OK because they're new, and knock has anything to do with setting this particular code. Until definitively proven otherwise they're just illusions in your head. Ooga-booga of the worst kind.

 

[suprasteveo]

Well I'm thinking that the sensor I have on the car right now may be bad. Is there a test I can do to prove this?

 

[supraguy@aol]

Ive never personally seen a knock sensor go bad, but im sure it happens.
I missed in the reading: have you tested resistance between your signal wire and ground?
AKA- take the plug off each sensor, and probe the terminal inside against a good ground.
If there is continuity, that means that somewhere in your wiring, you made contact between the shielding wire and the signal wire. And by the way- exactly what type of wire did you use?