Humid Hummus
Banned
- :
- 2016 Mazda CX-5
yes just installed a catch can but really surprised how much carbon buildup on a 25,000km car and look! oil dripping out the throttle body! shame on you mazda
Would I be able to check for build up by simply taking off the rubber boot and looking inside the throttle body? My Mazda has 110,000KM on it, so this much build-up concerns me especially considering this motor only has 25,000KM on it. That's very bad.
if your car is port injected yes "Italian tune up" could work but with newer cars direct injection might not really work.
That's correct, but you will still be cleaning out stuff such as your injectors, other carbon deposits within the engine, cat converters, etc with the good old italian tune-up. Try doing a full throttle pull to redline and note the very strong smell from your exhaust, if you haven't done so in a very long time.
BMW owners with direct injection engines have been walnut blasting their valves for a few years now to clean off the deposits. I was hoping Mazda solved that issue. May not after seeing these pictures.
This seems to be a very uncommon issue with these engines, as Mazda has taken some precautionary steps to reduce the amount carbon buildup. the 2011+ N55 motor from BMW does not have carbon build-up issues anymore however.
Yes, some manufacturers are doing that.
In theory, an intake treatment done through the intake/throttle body could remove some of the deposits. The issue with this method is that getting an even disbursement of the chemical is extremely difficult to achieve. Pooling is more than likely going to occur, so how much even cleaning is really being achieved? I do know that Gumout is testing various delivery methods to solve this problem. With that being said, I wouldn't use Seafoam specifically. It's overpriced for what it is. I won't advocate for any particular product, but do a little research on the various treatment options and pick the one with chemical profile you like best.
That's right. Your best bet is to just remove the intake manifold and physically scrape the s*** off if you are experiencing carbon buildup.
Wouldn't a complete tank of 91 or 94 octane with a good amount of fuel system cleaner and a good long run (2+ hours) on the highway take care of some of the carbon build up?
91 or 94 octane is not necessary, but I would suggest filling up with whatever fuel you can find that is ethanol-free, regardless of octane levels. Use the fuel system cleaner, and once getting out onto the highway with a fully warm engine do 1-2 full throttle pulls to redline, and then drive on the highway normally in 6th gear for at least half an hour.
Not really because fuel is injected in a direct injection engine. So you do not get the benefit of cleaning the intake valves like in a port injection engine. The fuel system cleaner will only be cleaning your fuel lines and possibly the fuel injectors, but won't do anything for the buildup on the valves.
It will still make a big difference if you use it, just not for your intake valves.
Are your high grade fuels like V Power laced with detergent like ours? It keeps the inside of an engine like a new pin.
I've been using V-Power in an old BMW of mine for a long time, and was surprised to see that the engine felt far smoother when I used a fuel system cleaner.
Toyota's new 203/206 hp Dynamic Force 2.5L naturally-aspirated engine used in new 2018 Camry and upcoming new 2019 RAV4 has Toyotas D4-S port and direct fuel injection according to Car and Driver
The Camry has a good 20 HP on the Mazda 6 and more torque, two extra gears in it's transmission, and is still slower. No thanks.
The FRS/BRZ engine also came with a port and direct injection engine. The transition going from port injection to direct injection is claimed to be what is causing the torque dip mid RPM. That torque dip is what allows the Miata to win comparos against the twins. I sure hope Toyota has addressed that in their new engines.
Port injection is more efficient when cruising at a steady RPM (highway driving) and Direct injection is more efficient when idling and during full throttle acceleration, so some engines switch between the two which is great because the port injection will clean the intake valves. I could see why this may cause a dip in mid-range torque, but this has little to do with the reason why the mid-range on this engine is so s***. It's a mix between the inherit design of the flat-four engine (not as smooth, linear or rev happy as an inline engine) and the exhaust manifold is a big reasons. Upgrading the exhaust manifold on that engine has been proven to smooth out the mid-range. It's not a Toyota motor BTW, Toyota doesn't make flat-four engines. The engine is made by Subaru.