When should the EBPV be open? I don't think mine is working right. It shouldn't open after the engine is at operating temperature, should it? For instance I'll drive 50 miles and as soon as I'm backing down on speed/power it will open up and it drives me crazy. It only does it when it's below 40 and of course it's a big difference in fuel milage. I've read post about making them exhaust brakes and just unplugging them which I just might do but nothing on how they should work so any info would be great!




1997 F 350 RC PS 5 speed 4x4

 

The EBPV closes when the engine is cold. I can't remember what the oil temp has to be before it opens (maybe 115?). It is also normal for it to close once you let off the throttle. When it's closed you shouldn't be to travel higher than 30 mph.

Sounds like yours might be sticking a little bit. I believe it's possible to clean the EBPV up to prevent sticking. Just unplug it and you will be fine. Or make it unto an exhaust brake.

 

yep I would just unplug it. both of my truck have been unplugged thru michigan weather and they make no noticeable difference. the plug in for the valve solenoid is right under the turbo intake tubing and is bolted tot he turbo. it is a two wire connector. just unplug it and forget it!

 

The EBPV will operate if amb temp is below 45deg and oil temp below 180deg.
Check oil temp sensor (out of range) and actual temp of oil. In my van i had to install a winter front to get temps up in the cold due to same issues. 180deg or lower cruising down the hwy is way to cold. Get the temp up (oil) over 200deg and you will even see an increase in MPG. Most PSD run at 200deg oil temp. I shoot for 220/230 for opt temp.
I have seen problems with the EBPV system due to a defective coolant T-stat. The motors were running to cold.

I no longer use the EBPV system.
I would use the EBPV system if it was controled by an idle validation not the current Exhaust pressure to overide. The valve does help control cold startup smoke.

Outside temp and oil temp activate system with the exhaust sensor (pressure) to overide during activation.

Bill