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Intake Carbon Deposits on new GDI GM Engines

VdellaV

By VdellaV
in Troubleshooting & Recalls

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VdellaV Enthusiast

VdellaV

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Hello Everyone

 

As many of you know, GDI engines are more widespread than ever, and with them, regardless of how well maintained they are, they always develop Carbon Buildup on the Intake Valves and Runners, specially TurboCharged engines, and with mileage as low as 30k.

 

Before having a GM Truck, I used to have a VW Jetta and rolled with many friends with GDI TFSI engines, so I know this problem first hand.

 

The most obvious sign of Carbon Buildup is decreased performance and fuel economy, along with difficulty to star the engine or even knock under load.

 

What I have been doing to avoid this problem early on in my cars is to bypass the PCV gasses to an atmospheric catch can or most recently to a Crankcase Scavenging System directed to my Exhaust, so the is absolutely no source of carbon going inside of my intake, but I understand this may not be a viable solution for everyone, so I would like to present another alternative: chemical prevention.

 

Every 6k miles, as part of my oil Changing interval, I also replace the Air Intake Filter and chemically clean my intake using fuel injector cleaner additives directly into my intake, like if I was using seafoam.

 

Most Fuel injector cleaners have high concentrations of PolyEtherAmines of PEAs for short, which is a carbon detergent, the exact same active ingredient on products like CRC GDI Intake Valve Cleaner, but all fuel injector cleaners have one or other detergent for this matter.

 

Below, you will find a video explaining how to apply this method to your engine and another video explaining how I came to the conclusion that any Fuel Injector cleaner will do the trick:

 

 

 

 

 

 

 

MikeNH Senior Enthusiast

MikeNH

Posted
Posted

Nicely made videos. What do you have for exhaust on that truck? It sounds amazing.

VdellaV Enthusiast

VdellaV

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4 minutes ago, MikeNH said:

Nicely made videos. What do you have for exhaust on that truck? It sounds amazing.

 Thank you! 

 

Here is my setup:

 

 

MikeNH Senior Enthusiast

MikeNH

Posted
Posted
5 minutes ago, VdellaV said:

 Thank you! 

 

Here is my setup:

 

 

 

Nice setup! I guess they don't do emissions testing in your area? I could never get away with catless long tubes here. haha

VdellaV Enthusiast

VdellaV

Posted
  • Author
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1 minute ago, MikeNH said:

Nice setup! I guess they don't do emissions testing in your area? I could never get away with catless long tubes here. haha

 

No, I live in Mexico, I pretty much can run whatever I please lol 

SS502 Senior Enthusiast

SS502

Posted
Posted
3 minutes ago, VdellaV said:

 

No, I live in Mexico, I pretty much can run whatever I please lol 

Do you have an upgraded driveline? Yeah that sounds killer...did you use a tune to raise your seep limiter?

VdellaV Enthusiast

VdellaV

Posted
  • Author
Posted
1 minute ago, SS502 said:

Do you have an upgraded driveline? Yeah that sounds killer...did you use a tune to raise your seep limiter?

No, stock driveline waiting to murder me

 

Im running a DiabLew custom tune loaded via a Diablo Intune i2

SS502 Senior Enthusiast

SS502

Posted
Posted
3 minutes ago, VdellaV said:

No, stock driveline waiting to murder me

 

Im running a DiabLew custom tune loaded via a Diablo Intune i2

Got ya! Yeah man get you a new driveline before it does get you!! 

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