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Home >> Pontiac >> 1992 >> Firebird Formula, 5.0 F, Standard, M39 >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Controls - System/Component Tests) >> Engine Sensors & Switches >> Engine Controls - System/Component Tests >> Knock Sensor
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Knock Sensor

WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 1991 Pontiac Sunbird, 1991 Pontiac Grand Prix, 1991 Pontiac Grand Am, 1991 Pontiac Firebird, and 1991 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect knock sensor harness connector. Using an ohmmeter, measure knock sensor resistance between sensor terminal and engine block. Resistance should be 3300-4500 ohms. Connect DVOM between sensor terminal and ground. Set voltmeter to 2-volt AC scale. Start and idle engine. Tap on engine block near sensor. A signal should be indicated on voltmeter. If no signal is indicated, replace knock sensor. Also, see TIMING CONTROL SYSTEMS and Code 43 in the appropriate G - TESTS W/ CODES article.

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