Good gravy. For your sake I hope it works :thumb:
:hehe: :thumb:Good gravy. For your sake I hope it works :thumb:
The turbo needs oil for sure, but it doesn't get it from the EBPV actuator cavity.
On the snap side of the cavity there are 2 ports, one is for incoming pressurized oil, and the one on the bottom of the cavity is for drain back when the EBPV is de-energized. Then there is the trough typy cavity at the rear of the ebpv cavity, I can only guess at what this one is for. The trough cavity exposes the drain back from the turbo. I don't know why it would be open to the plunger side of the EBPV, which is not sealed. This explains all the crusty oil build up on the shaft of the plunger, and then also all along that side of the turbo pedestal.
So some one please slap me if I got all this wrong unish2:
I'm pretty sure I'm ok to seal all these up and not affect the turbo oil flow. At any rate, it's to late to turn back now. I'm going to putty up these holes and if it turns out I'm wrong, I'll buy a new pedestal :dunno:
I just did the same thing, gutted the pedestal, and I had it WELDED up, by a good aluminum welder...there are 4 passages :
1 - the solenoid (vertical) shaft - weld it closed (remove nut - pull solenoid out)
2 - the long sloted area over the drain-back passage - weld it up, being careful not restrict it
3 - the tiny round hole - this is a PRESSURE port into the cylinder cavity that you sawzalled off - weld it shut.
4 - small rectangular hole just above pressure port - weld it shut.
that will, (and in fact DID it for me) do it for you....no leaks and LOTS more room to get at the pesky passenger's-side rear pedestal bolt.
I've been sitting here at work looking at threads all day about this and one of them explained that the PCM used EBP readings to help determine load. That would modify shift schedules and fueling. I'll try and get at that thread cause it was on one of those diesel programmer forums and looked reputable (but dont take this as first hand testimony cause he could be smoking).I took off the line and sensor ( and sawed off the sensor mount....mounted the fuel pressure regulator to the bracket when I did e-fuel) and sent off and got a "Dongle" to plug into the sensor plug....it tells the 'puter you have 10-11 lbs backpressure all the time....no more probs.......
I know this is an old thread, but I am new to the powerstroke community and have been doing a lot of searching. I figure when questions I have come up most of them will be applied to older threads.
I am considering doing the EBPV gut and pedestal trim mod. I understand the pressurized oil port into the cavity and the drainback port. The EBP solenoid activates that flow based off of what the EBP sensor tells it. I might even think of a way to pull the EBP solenoid and plug that hole, also.
What concerns me most is the trough type port mentioned in the quote below. Since that end of the EPBV cavity is not sealed, I am wondering if it is a makeshift vent for the oil passages (kind of like a crankcase vent). I am worried that plugging this hole could create some pressure in the passages and make oil leak somewhere it shouldn't.
Plus, have you had any problems with this mod, since it has been over a year?
The MAP and lots of other things.I thought the MAP is what determines load for the PCM.