Troubleshooting 10 Gen Honda Civic 1.5t poor performance and MPG issues
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- Опубликовано: 10 апр 2021
- My 2017 Honda Civic with 1.5 liter turbo L15B7 engine and almost 110k miles on the clock started having performance issues and poor gas mileage.
While troubleshooting these issues I looked into the air intake system and checked things like intake valves, turbo, intake leaks, etc.
Spoiler: The problem was a damaged intercooler which developed a leak
Congrats on solving the problem!! I'm quite surprised how clean those intake valves are after 100k+ miles, especially for a turbo GDI motor. I think they must have positioned the injector such that the intake valves get some fuel mist to wash them off during the intake stroke. If you look at teardowns of this motor it certainly seems like that was the intent of the designers. Honda engineering never ceases to impress me
Actually why I chose the 2L naturally aspirated. I knew turbos cause these issues so I opted not to have a turbo. I wanted to negate as much upkeep on the engine for longevity as I could when buying a Honda.
I hate new cars they have no room to work on every space is tight
Plastic engine?
Great video. My brother-in-law has a '17 Civic SI and he inspected the valves around 80k and said they looked very good with minimal carbon build-up. Thanks for sharing!
do you drive your civic hard? Driving it harder causes the intake valves to be warmer which also causes the carbon to burn off along as well. According to VW and Mazda its about 380 to 400° C temp on the intake valves will make the carbon burn off and not stick to the valves.
My 2018 Accord 1.5T just had a fuel injector fail at 58k error code P0172 (posted on my channel). Modern Honda look amazing but once the 3yr/36k warranty expires you're on your own and you have no idea how expensive modern Honda engines are to fix. Oil changed at 80%, Shell regular used 80% of the time, always did warm up the car in the winter. Dealer so out of touch they recommended brake fluid replacement at 30k. I've never seen this part fail in ANY of my past cars. When asked why the injector failed so early Dealer said they see them all the time and cost of replacement is $1600-$2500 (must replace all 4) and the new injectors warranty is only for 12k/12mos! I was in love and bought the 1st Accord on the lot with series ending in -0001 but when I made a case with Honda to see if it could be part of a bad batch all I got was the VM of the case manager for weeks on end. Very diassapointed
how much was the intercooler? Thanks.
Quick question: did you still could hit full boost on the dashboard meeter when you had the leak?
Is the build up of deposits from the outside air like fumes from traffic?
Awesome video. I've been looking for some photos or video of 1.5T valves with some miles on them. Those are clean AF, and that makes me feel a lot better about my Civic now. Thank you.
Great video sir. Keep it up for all us Civic owners
Awesome shot of the valves there's some buildup, but no airflow restriction. I'm currently around 67500 miles on my 19 sport touring. Usually being mostly city, averaging 37mpg every tank. My record was 42.8mpg on a road trip.
You are the real doctor on this one. Thank you for the video
Thank you for sharing this. I've been having the exact same problem with my Civic for a while now. It has less than 70,000 miles on it so I wasn't sure where to look first. I'll follow your lead and look into spark plugs and intake manifold first but I wouldn't be surprised if my intercooler was messed up too.
I found it funny when you showed the mpg since my 20 Civic Sport Hatch Cvt gets 25 MPG...but I mostly commute in inner city Chicago "grid". Definitely a really informative video, thanks!
Very informative video. Thank you!
Great detailed video! I had over 128k miles on my 2016 before it was totalled. It still ran great and was Ktuned for 65k miles.
The filming in this video was awesome.
I just bought a 2016 Civic and thought that I should be getting more power. So now thanks to this video I'm off looking for a leak in my intercooler