I have a 2016 Ford Fusion with turbocharger. It has 75000 miles on it.
It is idling rough. Occasionally it almost dies, then recovers and idles OK for a while.
When under load, it seems to run well. No hesitation that I can detect.
I understand that the valves might be fouled. It has direct injection, not injection outside the cylinder.
I am concerned about what I have heard about cleaning the valves. As I understand it, some valve cleaning solutions raises the temperature of the exhaust high enough that the turbo can be damaged.
Does anyone know how best to safely fix the rough idle problem on these kinds of engines?
Thanks in advance