EcoBoost Police vehicles update
As some of you may recall, I posted a thread back in 2012 when we got our first batch of EcoBoost's. Link Time for an update. I talked to the fleet manager yesterday. He said he doesn't like...
Forum Discussion
I'll be odd man out and say it's fine to idle these engines. In fact, it probably the best thing you can do for them.
Why? They are a stratified charge direct injected engine and as such they will go into ultra lean burn mode idling. Very, very little fuel is burned in this mode because they just have to fill a very tiny cavity in the piston to get a burn lit off.
The worst thing you can do to these engines is WOT runs.
Why? Because when you are WOT they will over fuel and go full rich to cool things off and also to keep detonation away. When this happens the engine will have a slight amount of fumes left over in the combustion chamber and when the intake opens up a very slight amount of reversion will let those fumes hang out in the last part of the intake and around the intake valve. These fumes have tars, oils ect in them and they will stick to the back side of the intake valve. The intake valve is red hot and will cook these tars and oils onto the back side of the valve. That is what these Ecoboost owners are seeing or will see in the future.
Another really bad thing to do with these engines is to do a WOT run and shut them down real fast. Why? Because some of the intake valves will be open and the fumes will migrate out of the cylinder and again stick to the back side of the intake valve causing carbon problems.
IMHO the proper fix is to add an injector to the intake track and program it to come on once in a while to clean the intake valves.
I don't think Ford will ever do this. They will come up with some half a$$ Band-Aid solution and call it fixed. The same way they dealt with the intercooler problem on these engines. :R
Why? They are a stratified charge direct injected engine and as such they will go into ultra lean burn mode idling. Very, very little fuel is burned in this mode because they just have to fill a very tiny cavity in the piston to get a burn lit off.
The worst thing you can do to these engines is WOT runs.
Why? Because when you are WOT they will over fuel and go full rich to cool things off and also to keep detonation away. When this happens the engine will have a slight amount of fumes left over in the combustion chamber and when the intake opens up a very slight amount of reversion will let those fumes hang out in the last part of the intake and around the intake valve. These fumes have tars, oils ect in them and they will stick to the back side of the intake valve. The intake valve is red hot and will cook these tars and oils onto the back side of the valve. That is what these Ecoboost owners are seeing or will see in the future.
Another really bad thing to do with these engines is to do a WOT run and shut them down real fast. Why? Because some of the intake valves will be open and the fumes will migrate out of the cylinder and again stick to the back side of the intake valve causing carbon problems.
IMHO the proper fix is to add an injector to the intake track and program it to come on once in a while to clean the intake valves.
I don't think Ford will ever do this. They will come up with some half a$$ Band-Aid solution and call it fixed. The same way they dealt with the intercooler problem on these engines. :R
