Direct Injection: The Dirty Truth!

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[carnaubawax]

Really looking forward to your induction service(s) videos. Thanks.

[thomask]

Hi Kenny,
On locomotives we used to get inlet port carboning. It was a similar situation. For a brief moment as the piston is arriving at the top of the cylinder and the intake valves open, a small puff of smoke/carbon enters the inlet port and then exits back out and into the cylinder as the piston begins its intake stroke. We used to use walnut shot to clean this out and it definitely improved performance!

[jimmykulik]

I think a catch can is a must. I also think people should actually use the average fuel consumption monitor the vehicle has and compare it with what the engine should be getting mileage wise.

[edwardmackey]

Thanks, Kenny. When you do videos on induction cleaning, please do one on the walnut shell blasting method if you can. I've watched numerous videos and the walnut shell blasting seems to work the best and takes the least amount of time. The machines for doing the walnut shell cleaning aren't nearly as expensive as I thought they would be (around $500 range). Ford Tech Makuloco channel put out a induction cleaning video using a walnut shell machine several months back and it was an eye opener at how quickly it cleaned and how well it cleaned when compared to chemical solvent cleaners.

[russellmaddock]

Direct injection engines need catch cans. Should be a factory installed item. They are not all that expensive, and on most vehicles, they are simple to install. I have one on my 2017 Yukon 5.3 which has 41, 000 miles on it. I also installed a Superchips Flashpaq F5 Tuner to delete the cylinder deactivation. Hopefully this will keep the lifters from failing down the road. So far so good. Really dislike the cylinder deactivation system. Terrible idea.

[robertguy]

you can manually clean the valves with the intake off quickly with zip ties in a drill, shop air, and some chemtool. it gets a little messy so make sure you cover up the other ports and make sure the ones you're cleaning are closed.

[banana]

a 2 part fuel system cleaning is ideal for this, they offer something similar at valvoline, sprays a cleaner into the intake with engine on and it burns up all the carbon deposits, good for VW engines audi, and GDI motors

[citizengroovesboogienation]

Valve overlap on the exhaust stroke (exhaust and intale valves open at the same time) causes exhaust gas to be blown back through the opening intake valve, thus leaving deposits that build up on the valves. With port injection, the intake valves are constantly being sprayed with fresh fuel thus keeping them much cleaner.

[xusn]

this is why I am very tentative about buying a newer car. I have a '07 civic with 304k miles and I am not happy that nearly every newer used vehicle is DI now. Look forward to the induction cleaning video.

[stealthginfiniti]

On GDI engines, I strongly recommend Induction cleaning every 30K miles. I've had luck with the twin pack of Seafoam that includes the Induction cleaning and gas tank additive. If the build up is too severe, chemical induction cleaning will not be sufficient. In that case media cleaning will be required. Walnut, Dry ice, or some other physical abrasion will be be used to help remove the crud. If possible install a catch can between the PVC and the intake to reduce the oil vapors from coating the intake valves.

[lexdunmon]

following Toyota's D-4S "dynamic force engine" some auto manufacturers are incorporating port induction in conjunction with GDI. additionally aftermarket catch cans/oil separators have been used between the PCV, & intake tract with favorable results.

[robertdiehl]

When I was 10 in 1985, my father's mechanic reved the engine of a 1976 Oldsmobile Cutlass Supreme and poured water down the carburator and tons of black smoke carbon filled the air for blocks. Man, that car ran like a top afterwards... Psa- use top tier gas only in g.d.i. .

[curtishill]

Awesome I can't wait my mother has a new Escape that has that and I want to clean it for it gets too bad

[jamessebastian]

Did my daughters Volkswagen 1.8T, used a sand blaster with dry ice didn't take long at all

[eadelfin]

YouTuber Humble Mechanic has a few videos on intake valve service. VW's / Audi's are notorious for gunked-up intake valves because of direct injection.

[philllsxga.]

I had a 2014 5.3. Di Silverado it had 149 thousand miles on, never serviced the fuel system, it ran perfect and still got 24 MPG highway.
I never took short trips in the truck and always used mobile gas and not one problem... No service engine light no rough idle nothing in 149, 000 miles...

[vinces]

My Ford F 150 with a second generation 3.5 liter eco burst engine actually has direct injection and port injection to help with the carbon issue because it was such a problem in the first generation, low speed it uses the port injection hi power demands it uses direct injection

[Johnnyism]

Kenny i have a 2018 Chevy Equinox LT 1.5 dual overhead cam Turbo with direct injection and i just had that service done what a difference it made. Come to find out their is a service bulletin out on this very topic for Cars with Direct Injection..FYI Great Video's Ken

[logancarter]

Looking forward to seeing the induction service videos.

[spelunkerd]

The worst thing about the present state of gasoline engines is the way the most robust engines are no longer made. I'm looking forward to your series on cleaning intakes for these GDI engines.