Question about 2001 Cadillac DeVille

3 Answers

STARTING 2001 DEVILLE

Many times when I turn the key/ignition switch it doesn't start, no noise, just dead. But if I continue to turn the key 10-20 times it will finally engage the starter. This onlt happens 3 or 4 times a week. I had the ignition switch changesd but it still does this. All the dash lights are on and the battery is good. I know cadillac has a special starter system that will keep the swithch engaged itself until the car starts. Could this system be the problem?

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  • Master
  • 2,712 Answers

It could be a loose wire or connector, defective or dirty contacts in the lock cylinder, broken wire coming from the lock cylinder or a temperature sensitive module to name a few things.

If this happens only when the temperature is cold, it could be a leaking Fuel Pressure Regulator (FPR), or due to lost pressure in the fuel lines due to cold, in which case you may have to replace the fuel pump / fuel filter / clean injectors.

The best way to diagnose this is to actually take it to a mechanic and have him check for you.

Hope that helps! Should you have any further questions, please post them here.

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IrishDruid

Posted on May 22, 2008

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  • Master
  • 3,037 Answers

Sounds like the crankshaft position sensor went bad because of the switch of supplier by GM. Take your car to a shop or AutoZone or other Car Parts place that can diagnose the problem on your car by hooking up a device to the computer in your car.

This sensor has had problems in I believe 00-03 models, the 04 models got an updated sensor that did not have these problems.

Replacing this sensor shouldn't be too hard yourself but have the car computer spit out an error code and see if P0335, P0336, P0385, or P0386 come up.

Let me know how this goes and good luck

Posted on May 22, 2008

  • Benjamin Patri
    Benjamin Patri May 22, 2008

    Symptoms of this problem Intermittent Engine Idle Instability, Hard/No Restart or Decel Stalls,

    this is what is recommend with this problem to check by GM


    • Inspect both of the crank sensor terminals for signs of poor
    connection or corrosion of both crank sensors. Pin drag test all four
    terminals.


    • Inspect the crank sensor circuit wires for signs of damage.


    • Inspect the crank sensor circuits at the PCM for poor connections.
    The crank sensor terminals should also be drag tested.


    • Remove the crank sensors and check for any debris on the sensor.


    • Verify crank sensor location (A on the bottom and B on the top) and
    verify that the sensor circuit wires are in the correct cavities.


    • Inspect the date code on the sensor. If it is before 0276, replace the crank shaft sensor and perform case learn.


    • If the date code is past 0276, verify the PCM grounds. A voltage drop test should be less than 20 mV.


    • If the PCM ground circuit verification is acceptable, then follow published PCM diagnostics.


    If the vehicle has an idle or decel stall, or near stall concern and only has DTC P1599 set, then the following should be done:


    • Verify the system power and ground connections for the PCM.


    • Verify crank sensor location (A on the bottom and B on the top) and
    verify that the sensor circuit wires are in the correct cavities in the
    harness.


    • Remove the crank sensors and check for any debris on the sensor.


    • Verify that the fuel pressure regulator is not leaking fuel past the diaphragm.


    • Perform the injector balance drop test and verify even pressure drops on all injectors.


    • Inspect and clean the EGR passages, as necessary.


    • Inspect and clean the IAC passages, as necessary.



  • Benjamin Patri
    Benjamin Patri May 27, 2008

    Were you able to fix this, if so then please give me some feedback by
    rating my solution. If you need any more help, I would be glad to
    assist you, just ask.

    thanks and Have a Great Day!

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  • Cadillac Master
  • 19,396 Answers

It is the ignition starter motor, you need to get it replaced

Posted on May 22, 2008

  • Ginko
    Ginko May 22, 2008

    The starter system, which keep the switch engaged is in the ignition block itself . If you already replaced the ignition block with a new one this should not be the problem, test the starter motor.

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