2.0 Turbo GDI engine roughness - Kia Forum
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post #1 of 104 (permalink) Old 09-26-2016, 02:12 PM Thread Starter
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Unhappy 2.0 Turbo GDI engine roughness

Good day Sportage group!

My first post, I have a serious question.

I've had my 2017 SX Turbo since April and and am generally very happy with the build quality and features. (less thrilled with the fuel mileage...)

For the last month or so I've experienced a lot of roughness during idle (I do a lot of stop & go driving) and surging during mid or full throttle operation (entering freeway ramps, etc.)
It seems clearly to be missing intermittently while idling in gear, and I'm guessing under heavy throttle as well (hence the surging...) . My dealer says there's nothing wrong and all GDI engines do this. I called BS (I'm coming from a Golf GTI - 2.0 Turbo with GDI - 10 years old & 170 K KM and NEVER did that...).

Anyone else have this issue with the 2.0 Turbo? The car has also thrown engine lights twice which the dealer has reset with no remedies...
Possibly the HOT weather this year may contribute, but I can't believe this is a normal thing...

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post #2 of 104 (permalink) Old 09-26-2016, 03:07 PM
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Originally Posted by KotchieD View Post
Good day Sportage group!

My first post, I have a serious question.

I've had my 2017 SX Turbo since April and and am generally very happy with the build quality and features. (less thrilled with the fuel mileage...)

For the last month or so I've experienced a lot of roughness during idle (I do a lot of stop & go driving) and surging during mid or full throttle operation (entering freeway ramps, etc.)
It seems clearly to be missing intermittently while idling in gear, and I'm guessing under heavy throttle as well (hence the surging...) . My dealer says there's nothing wrong and all GDI engines do this. I called BS (I'm coming from a Golf GTI - 2.0 Turbo with GDI - 10 years old & 170 K KM and NEVER did that...).

Anyone else have this issue with the 2.0 Turbo? The car has also thrown engine lights twice which the dealer has reset with no remedies...
Possibly the HOT weather this year may contribute, but I can't believe this is a normal thing...
Well you're right about the BS, that's for sure.

Do you know what codes it threw? My 17 SX has thrown two CELs and they were both P0303, which is a misfire on cyl #3 . On two separate occasion the engine has cracked the ceramic on the nose of the spark plug in cyl #3 . Twice, almost exactly the same place on the plug ceramic.

I wonder if your SX has done this as well but the dealer hasn't told you about it, just replaced the plug and reset the code.
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post #3 of 104 (permalink) Old 09-26-2016, 03:14 PM
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In my previous post I mentioned Hiccups at idle. This has cleared up a lot by not using Eco Mode and the Phillips 66
mid octane gas (87?)

JK
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post #4 of 104 (permalink) Old 09-26-2016, 04:10 PM Thread Starter
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In my previous post I mentioned Hiccups at idle. This has cleared up a lot by not using Eco Mode and the Phillips 66
mid octane gas (87?)

JK
Those were the first & second things I tried. Filled tank with premium, then ran on Regular & Sport modes - no change.
I usually run in Eco mode 'cause - why not?

My dealer can't get me in 'til this Wed!! I visited a second dealer who gave me a coffee and quickly ran a diagnostic - came up with several DTC codes - one of which is P0302 - misfiring on cylinder # 2!!

I will visit my dealer on Wednesday, and will complain bitterly about poor expertise in his service team. I'll mention that another dealer found the issue in < 5 minutes.
We'll see. If that doesn't get it fixed, I'll change dealers and mention the dealer name here.

Is the spark plug issue a common one with this engine? Can I expect this going forward?
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post #5 of 104 (permalink) Old 09-26-2016, 04:37 PM
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well i've had two cracked plug ceramics on cyl #3 . one at about 6000km and the second time at a little over 10000.

I'd bet a wad your plug in cyl #2 cracked as well and they just didn't tell you. Press the service manager for more information. i'd ask him outright if it was a cracked or damaged plug because you know that this has happened with other SXs. If necessary you might want to, politely, remind him that it's your car and you'd like to know what is going on with it.
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post #6 of 104 (permalink) Old 09-28-2016, 01:02 PM
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Originally Posted by KotchieD View Post
..
I usually run in Eco mode 'cause - why not?

.. [/B]
Because it loads down the engine too much at low rpm unless your using manual shift mode and are used to driving a manual 2.0t. It's fine on the highway but around town it tends to shift too soon and lug the engine a lot.

I agree with Sloppy, cracked plug on #2 . Personally, I would never run 87, no point. Use a ralphs card and get premium for 20 cents off.

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post #7 of 104 (permalink) Old 09-28-2016, 03:03 PM
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Originally Posted by mad_sb View Post
Because it loads down the engine too much at low rpm unless your using manual shift mode and are used to driving a manual 2.0t. It's fine on the highway but around town it tends to shift too soon and lug the engine a lot.

I agree with Sloppy, cracked plug on #2 . Personally, I would never run 87, no point. Use a ralphs card and get premium for 20 cents off.
Not sure what a Ralph's card is and what octane is your premium? I assume it's a step up from the regular. I average 24mph without using ECO mode and I like to punch it getting on the highway etc.

JK
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post #8 of 104 (permalink) Old 09-28-2016, 06:41 PM
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Originally Posted by SSportage View Post
Not sure what a Ralph's card is and what octane is your premium? I assume it's a step up from the regular. I average 24mph without using ECO mode and I like to punch it getting on the highway etc.

JK
Ralph's is a grocery chain in California. Regardless of the chain name, most states have a points card that gets you a discount on fuel at shell and other stations.

91 is the highest we have here. I would use 93 if it were an option. That's me though and my cars never stay stock, especially turbo cars.

To the OP:
These cars are speed density so unless you have a manifold leak, I would be looking at plugs first then map/iat sensor then injectors for rough idle issues.

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post #9 of 104 (permalink) Old 09-28-2016, 07:36 PM
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Originally Posted by mad_sb View Post
Ralph's is a grocery chain in California. Regardless of the chain name, most states have a points card that gets you a discount on fuel at shell and other stations.

91 is the highest we have here. I would use 93 if it were an option. That's me though and my cars never stay stock, especially turbo cars.

To the OP:
These cars are speed density so unless you have a manifold leak, I would be looking at plugs first then map/iat sensor then injectors for rough idle issues.
I do use a Phillips 66 Kick Back card. I was confused when you said 'why use 87%' when you're actually using higher octane.

JK
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post #10 of 104 (permalink) Old 09-29-2016, 11:33 PM
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Unless your vehicle is pinging (due to fuel pre-detonation), there is no point in running a higher octane fuel.
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