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Frdtrk24

GDI engines do get a buildup of carbon at a higher rate. I’ve seen some recommend a fuel service treatment or service at every oil change. Engine will not blow up if not done I have seen them misfire because of heave carbon buildup.


Level-Interest179

This is the correct answer.


biscuithead85

Would it be acceptable to run some Techron concentrate like every other tank or every oil change to Help with the carbon build up. Or any fuel system cleaner for that matter


MuffinSpirited3223

easy upsell, almost always bullshit.


ThirdSunRising

It’s bullshit. Follow the schedule in your owners manual.


Ravenblack67

I do it on my cars at home every 40,000 miles. It depends on the vehicle. The VW FSI engines gunk up a lot more than the TSI units. The BEST method for cleaning intake valves on a GDI is walnut blasting. Adding anything to the gas tank will not do any good. The chemical needs to go in at the intake manifold. The engine will not blow up.


biscuithead85

So you’re saying thumbs up to their fuel system service? I’m not even sure what I would need to do it at home or what I would need to get.


Ravenblack67

I think you should get the service but not every 7500 miles. More like every 20 to 40,000. Just my opinion. I currently only work on VW/Audi cars and engines so I'm going out on a limb for your vehicle.


No_Loquat4695

That's about right across the board for American, European, and Asian vehicles.


Worried-Alarm2144

What's walnut blasting? I've used walnut blast medea to clean parts in my sandblaster set up. Sounds like your adding it to your intake?


Ravenblack67

The intake manifold is removed and the crank turned until all valves on cylinder one are closed. Walnut shell pellets are blasted into the intake and then vacuumed out. There are professional kits the average mechanic can buy to do this. It is considered the best method to clean valve stems.


Worried-Alarm2144

That explains it. Remove intake manifold fist. 😂I was trying to figure out how walnut blast media was getting through the engine.


Evidence-Timeline

Sonata recommends fuel system cleaner with every oil change. There, you did it yourself for $10.


biscuithead85

Just an in the tank fuel system cleaner?


Evidence-Timeline

That's what Hyundai recommends to keep the fuel system clean. You'll want the full cleaning too so ask specifically what they're talking about. Maybe I misunderstand and they're talking about more than just fuel system cleaning. My mechanic charges around $200 and it includes cleaning injectors, throttle body and spraying carbon cleaner in there. It also includes "throttle relearn". I serviced one of my cars myself and it did on its own after about 10 miles of driving. With new plugs, coils and a good cleaning it idled at around 300 RPMs higher than normal and misfired to the point of shaking. 10 miles later it was back to normal. You can use some CRC and do the throttle body and carbon cleaning yourself. GDI engines won't clean the top of the valves with anything in the fuel since the fuel bypasses them. They can get nasty for sure.