Deville 2002 - Engine jerks at 3800 RPM
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Deville 2002 - Engine jerks at 3800 RPM in Past Cadillac Vehicle Discussion; I have this 2002 Sedan. high mileage. Runs fine at low speeds and idles well. But when revving up to ...
  1. #1
    theomail is offline Cadillac Owners Member
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    Deville 2002 - Engine jerks at 3800 RPM

    I have this 2002 Sedan. high mileage. Runs fine at low speeds and idles well. But when revving up to about 3800 RPM, engine starts jerking.
    And if kept there, engine will stall. Will start again easily after that. How can I fix tis lovely car. Battery is new.
    I omitted to mention that get message in the dash "Gas Cap" whilst the gas cap has no problem. On or off.

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  3. #2
    basscatt's Avatar
    basscatt is offline Cadillac Owners Master
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    Re: De Ville Sedan 2002 Engine jerks at 3800 RPM

    [QUOTE=theomail;11219497]I have this 2002 Sedan. high mileage. Runs fine at low speeds and idles well. But when revving up to about 3800 RPM, engine starts jerking.
    And if kept there, engine will stall. Will start again easily after that. How can I fix tis lovely car. Battery is new. [/QUOTE
    -----------------------
    first step is to check for Diagnostic Trouble Codes -

    if you don't know how - go here and read the ENTIRE post -

    http://www.cadillacforums.com/forums...odes-dtcs.html

    if you have any codes - post them here -
    ALONG WITH THEIR DEFINITIONS -
    -------------------

    that sounds like it could be starving for fuel -
    check the fuel pump pressure -

    if it has been a long time since the fuel filter has been replaced -
    might not help - but wouldn't hurt -

  4. #3
    Ranger's Avatar
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    Re: De Ville Sedan 2002 Engine jerks at 3800 RPM

    Sounds to me like you are bumping up against the rev limiter. The engine is RPM limited to 4000 in neutral or park to protect us from ourselves. It disable the injectors at about 4000.

  5. #4
    MoistCabbage's Avatar
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    That's IF his car is in neutral or park. But the rev limiter won't cause a stall.

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    Re: De Ville Sedan 2002 Engine jerks at 3800 RPM

    He said "revving" to about 3800 so I assume he is in neutral or park.

  7. #6
    basscatt's Avatar
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    Re: De Ville Sedan 2002 Engine jerks at 3800 RPM

    Quote Originally Posted by Ranger View Post
    He said "revving" to about 3800 so I assume he is in neutral or park.
    ---------------------
    hmmm - - I read that as hitting 3800 while driving - or accelerating -

    I never considered someone would rev the snot out of a "high mileage" engine in neutral -

    but you could be right -

  8. #7
    Submariner409's Avatar
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    Re: Deville 2002 - Engine jerks at 3800 RPM

    theomail, You keep bumping the rev limiter in P or N and the PCM will eventually simply shut down the engine. (Assuming you are revving the engine in N or P. otherwise, paragraph 3)

    "Gas cap" is a sort of generic warning caused by the fuel tank pressure sensor - it monitors the fuel tank and EVAP system pressure/vacuum and if those fall outside the sensor test parameters it sets the message - but if you perform a DTC code pull, using your car's built-in code scanner, you will find one or more trouble codes pointing to the EVAP system.

    Use the sticky thread just above these active threads - "How to pull codes" - study the proper year/model/instrument panel section for your car, get any codes stored and whether each is Current or History. Write them all down, return to the sticky to open the link to definitions of all OBD2 codes - decipher your codes and post all the results here.

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    Ranger's Avatar
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    Re: De Ville Sedan 2002 Engine jerks at 3800 RPM

    Quote Originally Posted by basscatt View Post
    I never considered someone would rev the snot out of a "high mileage" engine in neutral -
    I agree. Never could understand why anyone would do something like that.

  10. #9
    theomail is offline Cadillac Owners Member
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    Re: De Ville Sedan 2002 Engine jerks at 3800 RPM

    Thanks to everyone with the suggestions. I agree it sounds stupid to rev the engine so high in park. Am going to pull the codes and will post them here and then I will also explain why the high revving was done. Looks like the limiter could be the problem. With the hints received here, will check everything well first and then come back. I have 3 of these Caddys, each one with some ailment and started with the Base Sedan first. Thanks again.
    Theo

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