I have a 2002 A3, I had bought some Denso Iridum spak plugs and after a while the Ignition Coil on my cylinder 3 burned out, the spark plug also burned. So I bought a new Coil and inseted the my old NGK plugs. This work for about 6 months, and then again that Ignition Coil Pack on cylinder 3 burned out .

I'm afraid to test the spark plug on cylinder 3 on another coil, because the last time I did that it burned the other coil.

Has someone had this problem. Is this an electrical problem? a problem with the coil or with the spark plug? the petrol in my country is VERY bad.... could this also be a problem?

Any ideas or suggestions is welcome!

have a good one, thanks!