Ford V10 PCV system issue
I have something strange going on with the PCV system on the 6.8L V10 in my F-53 chassis motorhome. On my rig, the right valve cover is connected to the intake tract just forward of the throttle bo...
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Correct. Under WOT the amount of vacuum generated is at it's lowest (which is why there's an accumulator). The "input" side of the system should never be under vacuum though unless there's a suction effect from air moving past the connection inside the intake tract. Even then, it shouldn't be enough to pull oil up into the intact tract. I do not believe that it's normal (but it might have nothing to do with the pinging).
Removing the hose from the intake tract and capping the opening shouldn't effect the fuel/air ratio calculation since the volume involved is very small. It's a closed system though so you never know for sure what will happen when it becomes an open system. We're gonna find out though because I have a breather on order and I'm going to install it on the passenger side valve cover (well, cam cover but who cares) and cap the intake tract side. I can always add a breather to the intake tract opening as well.
I'm not sure what you mean by "spark knock" but knocking/pinging is always from detonation and it's definitely not normal and can damage the pistons.
Removing the hose from the intake tract and capping the opening shouldn't effect the fuel/air ratio calculation since the volume involved is very small. It's a closed system though so you never know for sure what will happen when it becomes an open system. We're gonna find out though because I have a breather on order and I'm going to install it on the passenger side valve cover (well, cam cover but who cares) and cap the intake tract side. I can always add a breather to the intake tract opening as well.
I'm not sure what you mean by "spark knock" but knocking/pinging is always from detonation and it's definitely not normal and can damage the pistons.
Teeton wrote:
Remember under heavy load or wide open throttle the pcv dose just about nothing. The other hose most likely have more vacuum at wide open throttle. Back a closed throttle pvc has more vacuum. The other hose will never have the vacuum that the pvc hose has. So That kinda normal (oily residue inside). You can not remove that other hose, as the mass air flow sensor is calculated with that hose on there and hooked to the vale cover.. Spark knock from time to time is also normal.
