Car Problem Reports

Cadillac DeVille DTS Misfire Due to Failed Ignition Coil

Cadillac DeVille DTS Problem
15 Reports
Me Too

Model Years Affected: 2001, 2002, 2003, 2004, 2005

Average Mileage: 105,799 mi (82,347 mi - 140,000 mi)


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.

  • Visitor, , 105,000 mi

    I'm having that same issue now, i was told by a mechanic that's it's the 6th cylinder that's having the issue.. My question is, is this bank of coils in a reasonable spot to work on.. I've fixed my door actuator n Chg oil, etc, but I'm kinda nervous bout messing the Northstar, any help would b greatly appreciated.. If it's not to difficult, I'd like to try rather than pay 620 to get it fixed

    Flag This
  • Visitor, , 98,000 mi

    Replaced front and back coil and plugs

    Flag This
  • Visitor, , 90,000 mi

    Car idles rough and check engine light is on and sometimes flashes. Worse when engine warms up but idles rough even when cold. Diagnostic check shows P0300 and 303 codes which indicates a misfiring in the #3 cylinder. I haven't troubleshot it any further. I don't want to drive it as it could do damage to the catylitic converter when the check engine light flashes.

    Flag This
  • Visitor, , 130,352 mi

    My vehicle was doing fine. I started it up one morning, and the check egine light came on,along with misfire and vibration. the diagnosis is misfire in # 4 cylinder. I am parking it until it can be repaired.

    Flag This
  • Visitor, , 82,347 mi

    misfire on one clyder

    Flag This
  • Visitor, , 102,000 mi

    Ignition coils misfire. Smell rotten eggs (Unburned Fuel)Need to replace ignition coils and catalytic converter.

    Flag This
  • Visitor, , 106,000 mi

    replaced the ignition coil with a new one from Cheapest prices around.

    Flag This
  • Visitor, , 98,500 mi

    Problem started around 98000 mi. Green Chevy/Cadillac diagnosed and repaired the problem quickly

    Flag This
Ask a Question