02 Deville Sudden Stall
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Northstar Engines and System Technical Discussion Discussion, 02 Deville Sudden Stall in Cadillac Engine Technical Discussion; I recently bought a 2002 Deville. I have experienced twice now a sudden engine stall. Once when coming to a ...
  1. #1
    danielscherbing is offline Cadillac Owners Member
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    02 Deville Sudden Stall

    I recently bought a 2002 Deville. I have experienced twice now a sudden engine stall. Once when coming to a stop at a light, I noticed warning lights but didn't hear the motor quit. It fired back up immediately. The second time, I was idling after pulling out of the garage. Engine quit suddenely. It fired back up and has not happened again.
    Also, I have noticed a very small flutter in the headlights when driving. It is almost as if they shut off completely for s split second and then are back on. I don't see it happeneing with anything else and I have already replaced the bulbs with no change.
    And third, I do notice a rough idle when cold, the motor seems to hop a little. I have tried the injector/fuel cleaners with no change.
    The car has approx 61000 miles. Let me know what you think! Thanks!

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  3. #2
    FrankT's Avatar
    FrankT is offline Cadillac Owners Enthusiast
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    Re: 02 Deville Sudden Stall

    Sounds like the ever famous 00 -02 Crankshaft Position Sensors (CKP)'s Reolace both sensors.
    Try pulling codes, you may or may not have some.
    The sensors are common problems in these years.
    Frank

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    dp102288's Avatar
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    Re: 02 Deville Sudden Stall

    There is a writeup on how to change the sensors in the somewhere on the forum. A search will point you in the right direction.

  5. #4
    codewize's Avatar
    codewize is offline Cadillac Owners Master
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    Re: 02 Deville Sudden Stall

    Yup, again.
    Ownership:
    91 Brougham d'Elegance 350
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    01 Deville DTS:
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    Future Plans: More interior work.


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  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, install a sound system
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    Re: 02 Deville Sudden Stall

    This is just a SWAG (scientific wild-ass guess), but the headlight "flutter" may be due to the microsecond shutdown caused by the crankshaft position sensor(s) triggering an intermittent "engine off" signal. We would like to find out if that problem disappears after you replace the CKP sensors 1 AND 2.

  7. #6
    dp102288's Avatar
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    Re: 02 Deville Sudden Stall

    ^^ Very interesting with the shutoff signal...

  8. #7
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    Re: 02 Deville Sudden Stall

    The headlights on my '01 will dim suddenly at random, but only for a split second. It corresponds with some other clicking sound at the back of the car. I guess it's some kind of big electrical draw. They don't shut off, but I can see them dim very briefly if I'm sitting in traffic and the lights are reflecting off of someone's car. I haven't noticed it while driving but I'm sure it happens.

    Also, I'd guess your crankshaft position sensor(s) are bad (and not related to the headlights).

    Jim

  9. #8
    Submariner409's Avatar
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    Re: 02 Deville Sudden Stall

    ^^ Turbojimmy......Could your headlight dimming be caused by the ride height compressor cycling? If so, there MAY be an air leak somewhere back there......A flood rebuild may have a loose hose nipple or something.....

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    turbojimmy's Avatar
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    Re: 02 Deville Sudden Stall

    Quote Originally Posted by submariner409 View Post
    ^^ Turbojimmy......Could your headlight dimming be caused by the ride height compressor cycling? If so, there MAY be an air leak somewhere back there......A flood rebuild may have a loose hose nipple or something.....
    I'm not sure. I replaced the compressor when I rebuilt the car. I've never tried to pinpoint the noise. Today I was putting air in the left rear tire (slow leak) and I heard the clicking. Not sure what it is. It's always 6 clicks, kind of like an on/off, on/off, on/off kind of thing. Until today it sounded like it was in my front driver's side door.

    Jim

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    Re: 02 Deville Sudden Stall

    Interesting idea about the leaky air compressor!

  12. #11
    Submariner409's Avatar
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    Re: 02 Deville Sudden Stall

    ^^ This is one for Sherlock Holmes. Let us know when you find the bug!

  13. #12
    FrankT's Avatar
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    Re: 02 Deville Sudden Stall

    Quote Originally Posted by turbojimmy View Post
    The headlights on my '01 will dim suddenly at random, but only for a split second. It corresponds with some other clicking sound at the back of the car. I guess it's some kind of big electrical draw. They don't shut off, but I can see them dim very briefly if I'm sitting in traffic and the lights are reflecting off of someone's car. I haven't noticed it while driving but I'm sure it happens.

    Also, I'd guess your crankshaft position sensor(s) are bad (and not related to the headlights).

    Jim
    Turbojimmy,
    I think it's the AIR pump active self-test. The algorithm for the AIR pump is such that it will perform an active test at very low speeds and light load conditions. When the AIR algo kicks in to perform the test it will run the pump for a few seconds ON/OFF about three times, then watches to see if the H02S switch lean.

    The AIR Pump has an in-rush current of about 55 amps, then draws a steady 25-30 amps. So you are correct that its a big electrical draw, but a normal one.

    If you want to verify if it's indeed the AIR Pump, pull the AIR Pump fuse for a few days and see if your headlights stop the dimming. If it does then we found your strange anomaly, replace the fuse and clear DTC P0410.

    Not all cars have the AIR system, but in 01 I think that all Devills have it.
    Happy New Year,
    Frank

  14. #13
    Ranger's Avatar
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    Re: 02 Deville Sudden Stall

    FWIW, I have noticed the same momentary dimming of my headlights on my '02 SLS & my '03 DHS. I don't think it is related to the AIR pump as I notice it when the engine is up to operating temperature so the AIR pump should not be cycling on at that point. I believe whatever it is, is normal since both cars have experienced it and I have heard others mention it.

  15. #14
    FrankT's Avatar
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    Re: 02 Deville Sudden Stall

    Quote Originally Posted by Ranger View Post
    FWIW, I have noticed the same momentary dimming of my headlights on my '02 SLS & my '03 DHS. I don't think it is related to the AIR pump as I notice it when the engine is up to operating temperature so the AIR pump should not be cycling on at that point. I believe whatever it is, is normal since both cars have experienced it and I have heard others mention it.

    Ranger,
    You are correct the AIR Pump runs when the engine is cold to help accerlaerate the catlyst warm up.

    However, the PCM runs two tests to diagnose the AIR system: Passive, and Active. The active test runs when the engine is warm. See below copy and past from FSM.


    Active Tests


    • The engine is running.
    • The engine speed is more than 600 RPM.
    • The throttle is steady.
    • The engine load is less than 80 percent .
    • The system voltage is more than 10.5 volts.
    • The MAF is less than 35 g/s.
    • The fuel system is in closed-loop operation.
    • The EVAP purge is active.
    • The ECT is more than 68°C (154°F).

    Happy New Year Ranger

  16. #15
    turbojimmy's Avatar
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    Re: 02 Deville Sudden Stall

    Makes sense to me. I'm not really worried about it, just curious. So what's the clicking? The relay? The clicking is in the back.

    Jim

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