Hi Scotty,
I frequently use the paddle shifters on my Taurus SHO 3.6l twin turbo direct injection engine to downshift when slowing. Does this in any way help or add to the problem of carbon deposits on the back of the intake valves? I will say it has gotten me nearly 90k on my original brake pads!
No.
brakes are cheap.
Engines/Transmission are not. You're just putting extra wear on them.
Thanks.i don't track this car but supposedly the tranny is built for it. Any thoughts on the Carbon buildup pros or cons by the higher rev downshifts?
It's a 3.5L Ecoboom engine (not 3.6)
It's direct injected, which means you'll have to clean the buildup whether you downshift or not.
High revs don't affect carbon build-up on the valves of those EcoBoost engines because gasoline is never sprayed over the intake valves. High and low RPMs don't change how the gasoline is put into the cylinders. It's sprayed directly into each cylinder instead of the older style, multipoint fuel injection system on the intake manifold. Even on those engines, engine braking wouldn't do a whole lot of carbon removal, the engine is trying to run at idle and the car's forward energy is forcing the RPMs up, not fuel quantity. Hard accelerations on old MPFI engines will help clean the valves due to the quantity of fuel being sprayed over the valves. GDI systems don't do this.
