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1999 Chevrolet Silverado 1500 Question: Replacement of Crankshaft position sensor

 

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raines1502, Vansant, VA, April 29, 2011, 20:23
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Hello
Changed the Crankshaft position sensor and now my truck will not start. Before changing the crankshaft, my truck would stall until it got hot and then it would work fine. What do I need to do? Thanks!!

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  • Answer #1

    April 29, 2011, 22:47
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     Master

    Verify the sensor is the proper application - a diagnostic tool should be hooked up to monitor crankshaft signal when cranking the engine to verify it is functioning.

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    raines1502, April 30, 2011, 06:06
     Rookie

    OK. But what has me concerned before changing the crankshaft sensor it did start and run...it would misfire at a high RPM and backfire.....now it will not even start.

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    DaveJHM, April 30, 2011, 18:45
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     Master

    This is why I suggested checking to make sure you have 1) a genuine Chevrolet part that is correct for the vehicle and 2) then check for crankshaft signal with a diagnostic tool.

    Sorry to say that everything else is totally guess work. Technicians try to approach issues scientifically, by eliminating variables first (in this case - a sensor of unknown quality was installed, now it's a no start), and then doing proper testing next (monitoring and checking for a signal from that changed sensor).

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    raines1502, May 01, 2011, 07:08
     Rookie

    Thanks!

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