Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
Can you explain a little more about the sparking? Are there literally sparks showing? And exactly where do you see them?
First make sure you have a good ground from the battery to the engine. If thee engine is not properly grounded to the battery it can cause problems like that. Are you getting a engine code for a misfire or a check engine light?
Clear the codes and then when the code reappears, try replacing that plug wire or all of them to see if it is just a bad plug wire.
After the codes are cleared, what code comes back first? It is unlikely that is the plugs, but it could be a broken coil that is shorting out to the engine.
I would try the coil next if I were you.
Let me know what you find.
And you made sure the battery ground is good?
Are you getting any codes now?
The only other thing I can think of is that the alternator could be shorting to the engine. But I would think it would be grounding through the ground cable.