2015 GDI Mass Air Flow (MAF) location - Kia Forte Forum : Sedan / Koup / Forte5 Forums
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post #1 of 6 Old 07-23-2018, 04:37 PM Thread Starter
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2015 GDI Mass Air Flow (MAF) location

I bought a can of CRC Intake Valve Cleaner Spray and it says to spray it after the Mass Air Flow sensor. Where is this located on a 2015 Forte 2.0 GDI. Thanks in advance.
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post #2 of 6 Old 07-23-2018, 06:55 PM
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First, why are you cleaning the valves on a 3 year old car? How many miles are on it? What symptoms make you believe you need to clean the valves?

You realize, a GDI engine sprays fuel AFTER the valves so it shouldn't need this. Only MPI engines that spray fuel in the intake runner BEFORE the valves get this problem.

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post #3 of 6 Old 07-23-2018, 10:13 PM Thread Starter
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The car has 70 000KM and the symptom is rough idle.

GDI engines are MUCH more prone to carbon build up and the CRC spray is designed for GDI engines. It is suggested to be used every 16 000 km (10 000 miles) and is a cheap preventative measure compared to having to remove the head and manually cleaning them with crazy things like walnut shells.
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post #4 of 6 Old 07-24-2018, 07:04 AM
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Ok, gotcha. You can use any vacuum hose on the engine. This might help:


2011 Kia Forte5 SX hatchback (daily driver)
2011 Hyundai Tucson (wife's car)
2012 Hyundai Veloster (1st daughters car)
2006 Kia Spectra SX sedan (2nd daughters car)
Previous cars: 2004 Hyundai Tiburon GTV6 - 2006 Hyundai Tucson V6 - 2006 Kia Sedona EX - 2008 Kia Rondo EX - 2006 Spectra5 SX hatchback
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post #5 of 6 Old 10-15-2018, 12:19 AM
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I just did what you are thinking about doing today. I bought a can of seafoam from canadian tire and just sprayed it at the bottom of the throttle body butterfly valve.
The forte doesnt have a MAF sensor so you don't have to worry.

Previously, i had someone step on the gas pedal to open the butterfly valve and i cleaned the opening with throttle body cleaner. On my car there was a lot of carbon buildup on the opening and stopping the valve from closing properly

60K KMs
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post #6 of 6 Old 10-15-2018, 01:00 AM
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where is the Butterfly valve?
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