Tony240ZT Posted January 21, 2002 Share Posted January 21, 2002 I have no idea if the knock sensor I have off of this `83 280ZX Turbo is good or not. It doesn't read any resistance when I test between the two terminals. Is this normal? Is there a way to test it? If I just leave it unplugged is this the same as having no knocking or the same as having constant knocking? Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted January 21, 2002 Share Posted January 21, 2002 The knock sensor is very high impedence. If it's shorted it's bad. The only way I know of to test it is the way I tested mine - hook it up to an oscilloscope and rap it on the bench. If you get a waveform on the scope, it's good. If you leave it unplugged, the ECU will not see any knocking, and this applies to a 300ZX ECU as well, that's the only way I got rid of the error code was to leave one terminal disconnected. Quote Link to comment Share on other sites More sharing options...
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