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Testing the knock sensor?
Posted by Eric [Email] (more from Eric) on Thu, 13 Mar 2003 23:06:23
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My 1982 900 Turbo knocks pretty good when the boost goes into the red, so I'm trying to determine what isn't working. The wastegate lever moves freely, and the little air solenoid controlling the wastegate is working.
The test procedure for the knock sensor seems simple: Hammer near the sensor and watch for small AC current to be generated. I've done that and don't see any response either at the computer under the rear seat or by unplugging the sensor and measuring directly. But the sensor (old style can) has three wires coming out of it, so it isn't real clear where to measure. I tried all the combinations and saw nothing.
Safe to assume the knock sensor is dead?
Will the new style knock sensor be a direct replacement?
posted by 209.42.225...
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