#4 coil pack goes out for 2nd time in 6months

Are you buying factory equivalent coils or sub standard ones?

coils, it has just one coil pack. with 3 coils integrated.
its not COPs.
there are many DTCs related, and not posted.
did you try new spark plugs, then new wires. and then only last the coil pack? check compression.
is it failing the same cylinder? (the will fail in pairs, if the pack is bad)
the pack runs 2 cylinders at once (in series)
injectors leaking or clogged.
since you didnt show the symptoms, i cant help much.


how.?
1 month or 1 year?, or how many miles?
answer 1
time, heat,vibration, oil contamination. (pressure washing them)
not using the dielectric grease on the boots.
getting water in the wells over and over, causing flash over , and carbon tracking.
what make you think they are bad.???
my guess, is you see P03xx codes and assume the means bad coil.?
post symptoms.
post scan data, and DTCs.

If your truck has spark plug wires, you will want to change those as well, as a bad wire can cause an ignition coil to short itself out internally.

Hyundia are the best car in the world. Sorry, but they are getting better. I haven't heard of a harness issue. anyway the coils have the ground in common, but the hot wires are separate. probably got there coil packs from china( junk). And I have seen coil packs break down one after the other on different models. Hopefully the dealer is using a better grade of coils. You might even ask them to go ahead and replace the rest of them, seeing there is an issue there. You just never know.
Randy

the problem is that water splashes on the coil for the no.6 cylinder

Check the ignition coil....coil pack. When the coil goes nothing works.

Have you check the O2 sensors? How baout cleaning the MAF and Throttle body? Thermostat?

How does the temp gauge look whn it stalls?

the ignition module may be going bad Are you using oem coils

check spark plugs and coil packs