Hi Scotty,
My daughter just bought a brand new Hyundai Tucson hybrid. She only has the car 3 weeks and put about 1500 miles on it. A few days ago the check engine light started flashing and the car started to shake. The Hyundai dealer said the car had a misfire in two ignition coils. They are going to replace 2 coils and 2 spark plugs. It sounds to me like they are not sure what caused the misfires. Why would 2 coils go bad? If it's the coils that are bad the why change the spark plugs? I would love to know what you think. Is there anything that I should ask the dealership?
Thanks for your time.
Why would 2 coils go bad?
Poor quality.
If it's the coils that are bad the why change the spark plugs?
Misfiring causes spark plugs to foul.
That was an introduction do Hyundai quality (actually lack of quality). The next step after this issue is fixed is tell her to get rid of it and buy a Rav4 or cr-v instead.
Welcome to the world of poorly engineered and poorly built Hyundai motor vehicles. Bad choice of cars. I'd get rid of it as soon as it's running properly and get a Honda or Toyota.
Scotty talks a bit more about Hyundai (and Kia) "quality" in one of today's videos:
https://www.youtube.com/watch?v=MaiMBXqmogA&t=79s
Probably a manufacturing defect.
I once had 3 coils on different cylinders fail one after another on my Corolla - doing some research, in my case, it was a manufacturing defect with that year of Corollas.
With how the new Gamma Hybrid T-GDi is, it is still unknown wether there are design flaws that cause these kinds of failures but by the sounds of things, just a defect.
It’s important to know that so far the main issue with Hyundai-Kia hybrids is the dual clutch transmission experiencing severe internal wear when not properly serviced!
Replace the DCT fluid every 40k miles with the correct spec (I believe it’s SAE 70W GL-4)
Driving on the e-motor (in EV or in RxEV mode, and not in Parallel hybrid mode) will significantly prolong it’s life.
