2001 Deville hesitates while accelerating

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Northstar Engines and System Technical Discussion Discussion, 2001 Deville hesitates while accelerating in Cadillac Engine Discussion; The deville seems to hesitate while accelerating. I changed the spark plugs but don't know the problem please help...
  1. #1
    lozartmn is offline Cadillac Owners Member
    Join Date
    Sep 2013

    2001 Deville hesitates while accelerating

    The deville seems to hesitate while accelerating. I changed the spark plugs but don't know the problem please help

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: 2001 deville hesitates while accelerating

    Just above this post is a thread - a "sticky" - titled "How to pull codes" from your car's built-in diagnostic code system. Study and use the proper year/model procedure, write down all codes found - they read out as a letter and 4 digits followed by Current or History - and then return to the sticky to open the link to all OBD-II code definitions. Decipher all your codes and post it all here.

    Your engine takes AC Delco #41-987 Platinum spark plugs - for some reason Northstars do not like other types/brands (DENSO and AC Delco, in these plugs, are one and the same.) Did you check the coil cassettes for cracks at the coil towers, and did you clean and check the boots for carbon tracking ?

    Welcome Aboard !!!

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