Question about 1997 Chevrolet Blazer

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97 S10 Blazer shuts down then restarts now turns over but won't start

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  • nathanielnor Sep 05, 2009

    before it wouldn't start at all. It would be driving and it would shut down, all gauges would go to 0 and the air bag and abs lights would go off and then turn back on it would start and run fine.....for awhile. Now it just turns over but wiil not fire.

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  • Chevrolet Master
  • 426 Answers

You need to check for spark and then also for fuel. It could be several different things The Crankshaft Position Sensor (CKP Sensor) is located in the front engine cover and is perpendicular to the crankshaft target wheel. The air gap between the sensor and the wheel is preset and not adjustable. The target wheel has three slots 60° apart and is keyed to the crankshaft. As the target wheel rotates, the slots passing by the sensor create a change in the magnetic field of the sensor which results in an induced voltage pulse. One revolution of the crankshaft results in three pulses (3x signal). Based on these pulses, the VCM is able to determine crankshaft position and the engine speed. The VCM then activates the fuel injector and provides a spark to the Distributor. The relationship between the crankshaft position sensor and the target wheel is crucial. The sensor must be exactly perpendicular to the target wheel with the correct air gap. This is one of the things with what it does.The other would be fuel related and could be the fuel pump in the tank.Based on the information you must eliminate fuel and spark.

Posted on Sep 06, 2009

  • Donnie Matney
    Donnie Matney Sep 06, 2009

    now it seems a little more like it is a short. you may wanna check the pcm and make sure the connections or the plugs to it have not become loose or any wires to it are not shorting.Check fuses also.You may have a pcm gone bad.

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  • Master
  • 3,513 Answers

Hi,

Hi,
This sounds like a classic ignition switch problem. Make sure it was replaced and not the ignition lock cylinder! Also check the battery cables for corrosion. You may have another bad ignition switch. Also check the wires to the switch down at base of column for loose connections.

Thank You for contacting Fixya.com

Posted on Sep 05, 2009

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  • Chevrolet Master
  • 6,982 Answers

Two items that can cause that are your fuel pump and crank sensor. There are numerous other reasons as well but those two are most common. Test anything before buying parts though or it can get expensive very fast!

Posted on Sep 05, 2009

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