2001 cadillac deville small hesitations
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Northstar Engines and System Technical Discussion Discussion, 2001 cadillac deville small hesitations in Cadillac Engine Technical Discussion; About 200mi ago i replaced the plenum,intake gaskets, spark plugs, upper and lower crank shaft sensor. The plenum had a ...
  1. #1
    JIMTON is offline Cadillac Owners Member
    Automobile(s): 2001 CADILLAC DEVILLE
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    2001 cadillac deville small hesitations

    About 200mi ago i replaced the plenum,intake gaskets, spark plugs, upper and lower crank shaft sensor. The plenum had a small tear and the car was shiftifting a little hard.Anyway the problem is while Im driving through town, maybe 35 or 40 i can feel little small jerks, nothing major, but i figure it will get worse.Its not sending any codes, or running bad otherwise. Thank you

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  3. #2
    blackonblacklac00's Avatar
    blackonblacklac00 is offline Cadillac Owners Fanatic
    Automobile(s): 00 DTS (RIP),04 DTS (Sold) 04 DTS (Present) 03 CTS (Present)
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    Re: 2001 cadillac deville small hesitations

    what kind of spark plugs did you put in?I heard if you use anything other then the original ac delco plugs you will get problems similar to what u got

  4. #3
    steck's Avatar
    steck is offline Cadillac Owners Fanatic
    Automobile(s): 2001 DTS / 1973 fleetwood
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    Re: 2001 cadillac deville small hesitations

    my plenum had a tear in it too...my mechanic couldnt figure out why they would all do this...but they all do eventually. this also threw a code regarding a 'lean right bank'

    i fixed my upper and lower crank sensors too recently on my '01 DTS. fun fun.

    as for your question, i dunno, but sounds like a tranny issue to me...(especially if it was already shifting hard)

  5. #4
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 2001 cadillac deville small hesitations

    Read the thread at the top of this forum's main page: "How to pull codes" and learn to use your car's built-in Diagnostic Trouble Code system. You don't need outside scanners or help. Use the URL in the thread which has "obd2" (OnBoard Diagnostics -II protocol) and write down your DTC's. Note whether each is Current or History. Then use the same link to decipher the P, B, U, and C code meanings.

    Codes are hidden until you open the system - DIC messages are not the same.

  6. #5
    JIMTON is offline Cadillac Owners Member
    Automobile(s): 2001 CADILLAC DEVILLE
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    Re: 2001 cadillac deville small hesitations

    I have used the dash for the codes and i do not have any.They were cleared when the plenum and crk shaft sensors were changed.

  7. #6
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 2001 cadillac deville small hesitations

    "Small hesitations" sounds like either a miss or some quick air/fuel correction. A miss will normally set a P0300 code, so look for a loose/dirty connector for the MAF, MAP, ISC, or TPS.

  8. #7
    thebigtomster is offline Cadillac Owners Member
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    Re: 2001 cadillac deville small hesitations

    I had a very similar sounding problem. Try disconnecting the EGR. It will throw error codes. But it may make the "hesitations" go away. Replacement of the EGR is simple and expensive. So make sure it is really the EGR. Also, the EGR system is extremely dirty. Try cleaning the EGR valve if it is the problem.

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