How can i test my knock sensor? I got a 89 smec 2.5. My snapon scanner shows 0v and 0 deg retard. Dont wanna take any chances
travis
How can i test my knock sensor? I got a 89 smec 2.5. My snapon scanner shows 0v and 0 deg retard. Dont wanna take any chances
travis
Take a hammer and gently tap around it, it should set it off or advance your timing and go gently drive it, looking for knock retard.
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Even when I don't have active knock retard I will still show a low knock voltage on my 4000e will driving and getting on the throttle a bit. If it is flat-lined a zero and never does anything but zero I would suspect a problem.
So theres no fault that set if theres no activity?
Every one I've seen on a scan tool shown more than 0v while running.
0.04V is a common voltage. I'd bet one showing 0 at all times is faulty and potentially dangerous. There is no monitor on that sensor.
Ok thanks guys!
Travis
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