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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 2002 deville rough idle HELP! in Past Cadillac Vehicle Discussion; The SES light will go out after 3 ignition cycles with the failure not detected OR you can go into ...
  1. #16
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    The SES light will go out after 3 ignition cycles with the failure not detected OR you can go into the onboard diagnostics and clear it.

    Technically, EVERY nut and bolt on the car has a torque setting. That said (Sub may disagree), I rarely ever use a torque wrench other than on lug nuts.

  2. #17
    816rider is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    well after my 2 drives, the SES light is still on...the car has been started prob 10 times today...can someone steer me in the right direction on how to clear the SES? also should i clear all of the other codes and start fresh to see what pops up?

  3. #18
    816rider is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    took a short drive to the gas station this morning to put in some techron...looked down and the dash was free and clear of that monster light known as the SES! thanks guys for all your help! my next challenge will be the fuel sending unit? so my gas guage takes a chill pill! unless the magic bottle of techron works?

  4. #19
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 2002 deville rough idle HELP!

    [QUOTE=Ranger;2624187]That said (Sub may disagree)

    I don't use a torque wrench on everything, either...............but when you're fooling with plastic manifolds and cast throttlebodies I figure it's good politics to advise a relative novice to use torque specs instead of "squeak tight + a quarter turn".

  5. #20
    2002 DHS is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    Submariner
    I read several posts about having rough idle conditions. It sounded like my plenum was bad so I replaced it even though the one I pulled out fine. A friend recommended the IAC and I cleaned it, still no better. What else can it be?

    Dan

  6. #21
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    Re: 2002 deville rough idle HELP!

    Have you cleaned the TB?

  7. #22
    basscatt's Avatar
    basscatt is online now Cadillac Owners 10000+ Posts
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    Re: 2002 deville rough idle HELP!

    Quote Originally Posted by 2002 DHS View Post
    Submariner
    I read several posts about having rough idle conditions. It sounded like my plenum was bad so I replaced it even though the one I pulled out fine. A friend recommended the IAC and I cleaned it, still no better. What else can it be?

    Dan
    ---------------------------------
    NEVER start by throwing a bunch of parts at a problem -

    DIAGNOSE the problem FIRST -
    THEN replace what is required - if anything -

    STEP ONE - ALWAYS -

    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 -

  8. #23
    2002 DHS is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    Today I put on a used IAC and the car ran the same. About 800+ RPMs it runs smooth but idle is rough to very rough and sometimes stalls.

    codes
    ABS C1287
    IPC U1000
    IPM B0429
    PCM P1189

    thanks
    Dan

  9. #24
    Ranger's Avatar
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    Re: 2002 deville rough idle HELP!

    Reread last line of post #22.

  10. #25
    basscatt's Avatar
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    Re: 2002 deville rough idle HELP!

    Quote Originally Posted by 2002 DHS View Post
    Today I put on a used IAC and the car ran the same. About 800+ RPMs it runs smooth but idle is rough to very rough and sometimes stalls.

    codes
    ABS C1287
    IPC U1000
    IPM B0429
    PCM P1189

    thanks
    Dan
    ----------------------------------
    it is CUSTOMARY to include the DEFINITIONS of any codes you may have -
    there are too many to have them all memorized -
    -----------------

    and like Ranger asked -
    have you cleaned the Throttle Body?

  11. #26
    2002 DHS is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    I did clean the TB. The codes are all not relevant to the issue. I don't know what to try next and can't afford a dealer. any ideas?

  12. #27
    MoistCabbage's Avatar
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    How many miles on the car?

    Any history codes?

  13. #28
    2002 DHS is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    93000 miles
    the codes I posted were all current accept the ABS.
    What are the ID numbers after the codes?

  14. #29
    Ranger's Avatar
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    Re: 2002 deville rough idle HELP!

    Those numbers ARE the codes.

  15. #30
    2002 DHS is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    Ok I'm confused. It asks it you want ALL CODES? I hit yes and then it starts listing them. Then it asks if you want to CLEAR ALL CODES? I hit yes. Then it asks ID? no takes you back to the start and yes takes you to more codes.
    If the IDs are the codes then what are the first set of numbers?

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