Question about 1989 Chevrolet C/K 3500

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I HAVE A 1989 SILVERADO WITH THE CHECK ENGINE LIGHT ON. I HAVE THE SELFT TEST ON AND I GOT CODE 32 AND 43. I NEED TO KNOW WHAT THEY STAND FOR. THANKS A MILLION FERNANDO SOTO711@CHARTER.NET

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  • brntwhts May 11, 2010

    SO IS THE EGR VALVE BAD OR POSSIBLY GUMMED UP? OR MAP SENSOR IS POSSIBLY BAD?OR COULD THE PROBLEM BE IN THE DISTRIBUTER OR PLUG WIRES?

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32 EGR open command did not change MAP sensor signal. Normal EGR flow should cause slight decrease in manifold vacuum which would change MAP sensor signal.
43 The ECM did not detect a knock signal during near wide open throttle operation with coolant temperature above 194� F or the knock signal was present for 5 seconds or more during normal engine operation.
Electronic Spark Control (ESC) Circuit .

Posted on Jan 22, 2009

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