Ryan Pinkston

I tried to start my car yesterday after making a 70 mile trip. The car wouldn't start and I had several pending codes. The fuel injection fuse blew and the car wouldn't start after clearing the codes and replacing the fuse. I had to leave the car where it was overnight so I could go home to get the tools I needed to check everything out. I took the wheel off and noticed right away that the coil pack on cly 6 had exploded. I had all 6 replaced last week with ones that I bought off of eBay. Looks like I should have spent the extra $100 and went with OEM coils. I still have no cly 6 even after replacing the coil and spark plug with ones that worked before. I must have more damage in the wiring. Has anyone else seen this before? What should I expect?

dan_189

Ouch! Not good, not too much to add on this but a year and model might help.

DBJoe996

Wow...just wow! Hope any damage is limited to the wiring and not the DME/ECU. That's some serious arching. Any brand or make on those ebay coils so others can avoid? Just replaced all my coil packs with the upgraded OE 997 602 107 02 for $259.06. From appearances, seems like something to go OE.

Botsy67

Agreed with Joe, I just did mine as well with the same OE coils from Warehouse33 but when I did my online search I did see those yellow coils floating around. Thanks for sharing your experiences here so others can avoid these in the future. Cheers,

RRTEC

Yeah holy crap. I almost bought those off amazon during my engine work.... that really blows (pun not intended)

808Bill

Please share and warn others of the brand!

dkraige

Wow that looks more like a melted crayon than a coil pack!

Ryan Pinkston

I'm hoping for the best too everyone. These are on a 2002 C2.

Macster

About all I can advise is replace all 6 coils with OEM coils and then see if the engine fires and runs ok.

'course, at the #6 coil you should check the engine wiring harness connector for any signs of damage/arcing.

Assuming the engine cranks but doesn't fire then you will have to check the usual: spark and fuel.

Ryan Pinkston

Could this be related to improper torque on the coil or plug? What about too big of a gap on the spark plug?

docmirror

The following is an internet diagnostic with NO background on this specific car.

A coil has two windings in it. In this case of a ignition coil, the primary is a low voltage, high current winding, and the secondary is a low current, high voltage winding. It is more than likely there was a short between the two electrically isolated windings. This caused whats called a flyback from the high voltage side into the low voltage side. That voltage stacked on top of the supply voltage from the ignition driver circuit, causing damage to the driver which provides the low voltage, high current to the coil(s).

Some of the power exceeded the potting material heat capacity and destroyed the case. Some of the electrical potential went back up the wires from the driver and damaged it. I don't know what the ignition driver circuit of the 996 looks like, or where it is, but hopefully the damage will be confined to the ignition driver module.

If the engine is running, but cyl 6 is not working then most likely it will be the ign driver. If the car is not running at all, start with the ign driver module, and see what happens from there.

Again ---- internet diagnosis with little info. YMMV