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.Google+
Car Problem Reports
Cadillac DeVille Misfire Due to Failed Ignition Coil
Cadillac DeVille Problem
Average Mileage: 111,042 mi (40,000 mi - 195,000 mi)
Visitor, 2002 Cadillac DeVille, 106,000 mi
'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...
when i go to give it some gas car starts shaking like, it doesnt stall, it feels like a misfire but not sure.
Visitor, 2001 Cadillac DeVille, 145,000 mi
Engine shaking occured during normal driving. Check engine light blinking constantly while driving.Replaced both ignition coils corrected the problem. Very costly.
Visitor, 2003 Cadillac DeVille, 118,000 mi
Dead miss confirmed by OBD II on no 6 cyl. Replaced coil pac.
Visitor, 2000 Cadillac DeVille, 170,000 mi
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!
Visitor, 2002 Cadillac DeVille, 111,000 mi
replaced both coils
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.
Visitor, 2002 Cadillac DeVille, 116,000 mi
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
Visitor, 2003 Cadillac DeVille, 87,000 mi
car runs ruogh check engin light on says misfirer on number three cylinder.also has crankshaft senser bad.
replaced front module. now i am told the rear needs to be replaced also