GDI engines suffer dirty intake valves?
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I wasn't aware of this issue regarding GDI engines. For the PCV there are blow-by filters that can be a solution to prevent those oily residues, but the EGR is more critical...
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Throttle bodies sure get gooped up so I can see the likelihood of this happening.
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My dad's F-150 Ecoboost is having other GDI problems: oil dilution. The oil level keeps going up (with gasoline), so oil changes end up being every 5000 km, despite the recommended interval being much longer.
According to the Ford dealership, it is a common GDI problem and right now there is no fix for it. Yay ford. |
Had a '68 EFI VW that did that; cold start circuit was always on, so it was always way too rich.
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Latest MINI COOPER S's suffer with inlet valve clogging, dealers are doing walnut shell blasting to clean them for free under warranty.............
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I've heard of varnish build-up in the tanks for Cooper S's. Not sure if it happens there, too. Lots of fuel pump issues with BMW's direct injection system. Weird they didn't include MINI in the recalls.
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I didn't realize that Ford was having the problems with Fuel dillution that the others were having. Makes sense , though , as that seems to be a problem with DI engine.
And the intake valve crud is also a common problem with DI engines. A lot of people are converting their DI engines to a catch can type of system. |
Yeah, my dad first noticed when he drained the oil for an oil change. He runs dyed farm gas and his oil came out bright red.
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EGR isn't likely to be an issue or contributor for this problem.... most engines these days don't have EGR valves, instead VVT is used to change cam timing around so that when the piston starts it's downward motion for the intake stroke, the exhaust valve is left open enough to draw in exhaust gasses with the fresh air charge, essentially an internal EGR mechanism.
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