Coil Cooking

[Ghoste]

What would be the usual cause of a car destroying ignition coils in short order?  No oil leakage and all else appears stock.  Can a ballast value wander from stock and function normally except for delivering high voltage to the coil?

[Mopar Nut]

What would be the usual cause of a car destroying ignition coils in short order? 

Cheaply made coils. Coils with oil should be mounted upright. I have a coil with epoxy MSD 8222, never had a problem.

[A383Wing]

crappy ballast resistors also

[Ghoste]

The one that just crapped is epoxy sealed.  Therein lies the head scratching.

[Mopar Nut]

The one that just crapped is epoxy sealed.  Therein lies the head scratching.

  Once you figure what is causing the coil to fry, I would buy a epoxy filled. Runs cooler.

http://www.summitracing.com/nv/parts/msd-8222

[Dino]

What brand is the epoxy coil that bit it?  They can be bad ot of the ox but seeing you're popping them in rapid succession points towards another source. I'd try replacing the ballast resistor first.

[Pete in NH]

Ghoste,

Let's start at the beginning and see if it might be the wrong value of ballast resistor. What ignition system are you running, stock point system, Mopar ECU, or ? Also what year Charger and engine. Are the coils you have been using for your year car and engine?

Ballast resistors seem to cause a lot of confusion and there are a range of values available. The ballast and coil need to be matched to each other.