2017 Sportage SX shaking terribly - Kia Forum
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post #1 of 39 (permalink) Old 05-02-2017, 07:44 AM Thread Starter
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2017 Sportage SX shaking terribly

I was driving from NY to Myrtle Beach SC…
During a rain storm, the car started to shake terribly…
I pulled off 95 somewhere in the back woods on NC….
Not to be disrespectful, & I know I was not in Georgia….
But the movie Deliverance came to mind…..
Anyway….
At this point it was shaking terribly, but I was afraid to shut off the car….
Fortunately there was a Kia dealership 20 miles away. I drove there, it took over an hour.
Sunday at 7:00 pm, I knew they would be closed, but I rather be stuck there then having dinner with Bubba!
When I got to Kia….. (After I figuring out they moved 2 miles away)
I shut the car off, took off the top cover & looked around…..
Restarted the car & looked for a vacuum leak or something loose….
I jiggled, tapped & pushed on everything…. I got a slight improvement.
I decided to drive to Myrtle Beach (another 250 miles) since the car restarted after a few tries….
When I drove in 4th gear, about 55 mph the car stayed smooth…..
Well, I made it safely there a little after 1:00 am.
I brought it to Kia of Myrtle Beach in the morning…..
Believe it or not, it was a bad spark plug…..
I was driving on 3 cylinders…..
BTW, I averaged 25.3 miles per gallon on 3 cylinders.

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post #2 of 39 (permalink) Old 05-02-2017, 08:32 AM Thread Starter
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16,700 miles, Cylinder #3
Cylinder 3 seems to be a common problem.....
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post #3 of 39 (permalink) Old 05-02-2017, 09:35 AM
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Originally Posted by User-Name View Post
I was driving from NY to Myrtle Beach SC…
During a rain storm, the car started to shake terribly…
I pulled off 95 somewhere in the back woods on NC….
Not to be disrespectful, & I know I was not in Georgia….
But the movie Deliverance came to mind…..
Anyway….
At this point it was shaking terribly, but I was afraid to shut off the car….
Fortunately there was a Kia dealership 20 miles away. I drove there, it took over an hour.
Sunday at 7:00 pm, I knew they would be closed, but I rather be stuck there then having dinner with Bubba!
When I got to Kia….. (After I figuring out they moved 2 miles away)
I shut the car off, took off the top cover & looked around…..
Restarted the car & looked for a vacuum leak or something loose….
I jiggled, tapped & pushed on everything…. I got a slight improvement.
I decided to drive to Myrtle Beach (another 250 miles) since the car restarted after a few tries….
When I drove in 4th gear, about 55 mph the car stayed smooth…..
Well, I made it safely there a little after 1:00 am.
I brought it to Kia of Myrtle Beach in the morning…..
Believe it or not, it was a bad spark plug…..
I was driving on 3 cylinders…..
BTW, I averaged 25.3 miles per gallon on 3 cylinders.
We just left Myrtle Beach, yesterday, but not in the Sportage. I hope your problem does not return. Enjoy the beach!!
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post #4 of 39 (permalink) Old 05-02-2017, 09:54 AM Thread Starter
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Thanks!
I love it here....
I come down once a month for business....
I'm a home builder down here.....
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post #5 of 39 (permalink) Old 05-02-2017, 11:11 AM
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16,700 miles, Cylinder #3
Cylinder 3 seems to be a common problem.....
let me guess, you are running regular fuel in it right?
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post #6 of 39 (permalink) Old 05-02-2017, 12:51 PM
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Thanks!
I love it here....
I come down once a month for business....
I'm a home builder down here.....
Good to know! We want to retire in the area, so we are there a couple of times a year.
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post #7 of 39 (permalink) Old 05-02-2017, 06:21 PM Thread Starter
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let me guess, you are running regular fuel in it right?
Yes....
Regular.....
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post #8 of 39 (permalink) Old 05-02-2017, 06:57 PM
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Yes....
Regular.....
so there you have another hi compression 17+psi of boost turbo that pukes a plug on regular fuel. These engines need premium fuel for reliable operation.

They are borderline on 87 octane fuel and these plug incidents clearly illustrate that IMHO.
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Last edited by Sloppy; 05-02-2017 at 07:00 PM.
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post #9 of 39 (permalink) Old 05-02-2017, 09:40 PM
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so there you have another hi compression 17+psi of boost turbo that pukes a plug on regular fuel. These engines need premium fuel for reliable operation.

They are borderline on 87 octane fuel and these plug incidents clearly illustrate that IMHO.
Interesting I thought I saw somewhere that this vehicle does not need premium

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post #10 of 39 (permalink) Old 05-02-2017, 10:53 PM
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Interesting I thought I saw somewhere that this vehicle does not need premium

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According to KIA and the owners manual it does not need premium fuel. From what I have seen in the technical data and how this engine has been de-tuned and reprogrammed since it's debut in 2011, I would guess due to reliability concerns and long term issues, they have de-tuned the power in favor of longer life and less issues. Compression is down slightly, along with less aggressive timing profile. If someone is experiencing cracked spark plugs on a recurring basis, I would have to believe there is something wrong which is causing it, not the octane level of the fuel being used.

What you can't tell by plugs cracking and is not accounted for by others assuming it is fuel octane and knock causing the plug issue, what they are not thinking about is how small variances and wrong readings on sensors can drastically affect the way an engine is running. It is entirely possible and probable that something is not working as it should, and is affecting how the engine is applying timing, causing it to have detonation and cracking the plug. Instead of trying to up the octane in hopes it goes away, they should be attempting to get KIA to find the true underlying cause. Upping the octane just masks the problem until is gets far worse. Detonation on a turbocharged engine can lead to catastrophic piston failure and engine seizure.

I had the 2.0T in my 2011 sonata, and ran that engine for over 100,000 miles without any issues, and used 87 octane fuel for that entire run. Never a problem with it. And that is one of the engines that supposedly has the reliability issues and a recall on it for engine failure. I would have to assume the percentage of vehicles affected by the defects is still rather small, but because so many of the engines were sold, it seems like a lot when you hear the complaints. I was a satisfied owner, and even knowing about the recall issues, still went ahead and bought my Kia with the 2.0 T-GDI engine.
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