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I have a couple questions maybe someone can answer, the car seems to have a hesitation when taking off from a stop, once it's going it fine only seems to does it right of idle. Any solutions for that ? Could it be carbon build up on the valve seats ? like most GDI's get ?

Also I have heard using some oil between changes is normal on the GDI's (direct injection) will adding oil like 5w-40 help with that ? I have heard it will but just curious if anyone has any real world experience with it. Car has 106,xxx miles on it.

Also has anyone tried the CRC 05319 Intake Valve Cleaner you spray it in the intake (while the engine is running) to remove carbon build up on valves.
 

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Well, there is some turbo lag...


My 2012 (90K miles) doesn't seem to be consuming any noticeable amount of oil between changes. I'm using 0W-40, European spec.
 

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Could be build-up, could be turbo lag, or could just be that the engine's not fully warmed up when you experience the hesitation. Hyundai limits boost in first and second gears to avoid torque steer, but there's less limitation imposed once warm AFAIK.

I sprayed intake valve cleaner a little while back...engine seemed to run smoother and have a little more power, but could've been placebo effect. I do regular maintenance and drive spiritedly so haven't noticed much performance degradation over time...
 

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According to Hyundai, I believe, the plugs should be replaced every 45K miles. Have pulled the to check what they look like?
 

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Welcome to the club!

There are a lot of little things that you will have to deal with but if done correctly you can make the car last and it will be fairly quick.

First things I recommend:

- Oil catch can - Which will help separate the oil and fuel vapors from your vacuum lines that eventually get sucked back into the motor, burn up and turn into carbon.

- Spark plugs - Self explanatory, though be sure to use the correct ones. 18849-09085 with SILZKR8E9G on the ceramic.

- EWGA check or adjustment - Exhaust Wastegate Actuator is an electric motor that controls how much boost the turbo produces by opening and closing an internal flap on the turbine housing. It has to be within spec (4.0V +/-.1V) or it can hinder performance.

- Air filter replacement - Self explanatory again, just make sure it's clean and if it's old just replace it. K&N makes a drop in replacement.

- 5w40 full synthetic oil - The only oil you should run in a 2.0T, this will help with fuel dilution caused from GDI, also will help with the higher temperatures. I run Amsoil, but there are plenty other choices out there.

- Torque app - This coupled with a OBDII bluetooth adapter will allow you to monitor the various sensors on the car.

- Intake Valve Cleaner - I use CRC IVC but you can use whatever you would like. Use the hose that is connected to the pcv valve.

I could go into detail but i'm out of time at the moment, I'll send you a pm with more information.
 

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Would suggest an ATF change. The fluid at 106k is quite used up and getting in 4 quarts of the newer SP4-M will help with shifts compared to the older SP4 fluid in there. Coolant change if not done at 5 yr/60K is recommended.
 
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