Mysterious coil
 

These coils are in my 2005 Cadillac Deville. O Reilly's can't find them in their system. Anybody know why? When I bought the car I thought it was the original motor.

Well that didn't work. No picture!��

How do you post pictures??

Mysterious coil
 

How about this one ?

pix too small can tell what it is

Slowroll did you try double clicking on the pic?

Managed to blow up pix. It appears to be and ignition coil. But not for 05 Deville. The Northstar ignition coil is service as a assembly of 4 coils. The Cadillac V6 uses individual coils. Coils and module come off valve covers as assembly.

These are the coils that were in my car. It ran perfect with them. But now #5 is misfiring. Replaced all coils on the back bank like you are talking about. Ran perfect for about 30 min on the way home. Turned off and started again about 2 hours later and it started missing again. Same #5! Check engine light flashing! Wth???

I'm getting a PO 356 Malfunction code. Car feels like it's running on about 4 cylinders! Hello please!

p0356 is number 6, be sure to check spark plug. I would stay with AC spark plugs.