2005 Cadillac DeVille Misfire Due to Failed Ignition Coil

An ignition coil may fail causing one of the cylinders to misfire . Each of the two banks of cylinders has its own coil assembly. If one ignition coil fails the coil assembly for the corresponding cylinder bank must be replaced.

Affected Model Years

This issue affects Cadillac DeVille model years 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, .

124 people reported this problem

  • 2005 170,000 Miles
    misfiring, poor acceleration, runs terrible! Changed coil pack, spark plugs, fixed & replaced o2 sensors and 2nd & 3rd cylinders...still no go!!! Trying fuel pump...not getting any codes!

  • 2005 106,000 Miles
    'Service engine soon' light is on. It states that 'Cylinder 8 misfire' is the problem. I'm hoping it's something simple like a failed ignition coil on that cylinder or a spark plug...

  • 2005 145,000 Miles
    Engine shaking occured during normal driving. Check engine light blinking constantly while driving.Replaced both ignition coils corrected the problem. Very costly.

  • 2005 133,400 Miles
    when i go to give it some gas car starts shaking like, it doesnt stall, it feels like a misfire but not sure.

  • 2005 97,153 Miles
    service engine soon light flashing had it checked said it was #4 cylinder misfire

  • 2005 138,000 Miles
    engine at different times starts to misfire runs roughand some time dies. poor accelerationi have replaced the o2senor on front and back exhaust manifolds and also the mass air flow sensor to no improvments.

  • 2005 0 Miles
    replaced front three times with aftermarket. recommend against aftermarket their not reliable. Replaced the rear bank and now getting a misfire code on #7

  • 2005 87,000 Miles
    car runs ruogh check engin light on says misfirer on number three cylinder.also has crankshaft senser bad.

  • 2005 118,000 Miles
    Dead miss confirmed by OBD II on no 6 cyl. Replaced coil pac.

  • 2005 116,000 Miles
    had this problem replaced coils and everything was fixed coils are very expensive the labor doesn't cost much the part itself was close to $ 350 total job cost was $ 800. recommend replacing spark plug with this coil job

  • 2005 150,000 Miles
    Misfire on cylinder 5

  • 2005 130,110 Miles
    Front coil pack self destructed at about 126000 miles followed by the rear coil pack at 130000. These Caddys are built like an old AMF Harley...if you like it you will constantly be sinking money into it and working on it every couple of weeks. Typical American car that lasts about 100000 miles (for $ 50,000) and goes to hell. On another note my Mitsubishi just turned 300000 without ever having an issue and cost 1/3 of my gas guzzling American crap box. Being close to 50YO I have had lot of cars and the Japanese have completely kicked our asses. We have produced nothing but garbage since the 70's. Unless you got tons of spare cash, another car, and lots of patience I would avoid Cadillac and get yourself a Jap car that will last over 200000+ miles.

  • 2005 111,000 Miles
    replaced both coils

  • 2005 146,000 Miles
    car shakes and runs rough due to coil packs needing to be replaced.

  • 2005 86,000 Miles
    Missfire on cylinder 8. Car shaking on idle and shut off on low speed or under trafic light. Scanning toll show Crank position sensor B need to be replace.Swaped ignition coil 6 and 8, now is missfire on cyl 6,Went to autozone and replace front bank, $ 170 and problem is gonne, i hope this post will help someone.

  • 2005 98,000 Miles
    new plugs and coil

  • 2005 116,000 Miles
    Mis fire on cylinder # 6 , got the coil pack and need steps to find out where cool pack is located on this 2004 Cadillac deville

  • 2005 128,000 Miles
    Is not fixed yet

  • 2005 85,000 Miles
    replace both side engine coil

  • 2005 124,500 Miles
    replaced front module. now i am told the rear needs to be replaced also