In my 96 f250 powerstroke I have had a reoccuring problem with bogging especialy in cold weather. When the weather gets cold I find the truck starts fine but when its warmed up and ready to go the truck will get up to speed and wont hold the RPMs and fall about 500 RPMs and bogg and then will come out of it and get back up to RPMs and fall back down. I originaly thought this was a gelling problem so I ran anti gell and some injector cleaner and the problem persised. I changed the fuel filter twice and no luck same problem. I did discover something one day that if I turn the truck of and on I am able to sometimes catch it and the truck will run fine. problem even stays when useing block heater. Dont know if its a sensor or something eletrical. Has anyone heard of this or know the problem?

thanks,
justin

 

is the engine bogging with light or not throttle? you mention cold weather. The EBPV closing will certainly cause engine to lose rpms until you get back in the throttle, then it should open up and let you be on your way. Do you hear wooshing sound when engine bogs? I've seen problems where the valve will stay closed even when light to medium throttle is applied, making it no fun to drive when its cold. When you say somedays it runs fine, may indicate it being warm enough for the EBPV not to even actuate at all. automatic or stick?

 

the truck has the e40d automatic and the bogging seems to happen no matter how many RPMS I give it, low or high. say I bring the RPMS up to 2000 the truck will bogg down to 1500 and then get back up to RPMs again and then fall back down again. does it at highway speeds I can feel the truck bogg and hold back and then come out of it. there is a wooshing sound when it boggs. Not sure what the EBPV is.

Justin

 

Bingo, we got it. Ok the EBPV =Exhaust Back Pressur Valve. It is a butterfly valve inside the exhuast turbine housing just before the downpipe connects. this valve is controlled by your PCM (computer) and actuated by oil flow to the turbo. It is suppossed to close after start up when its cold(I don't know exact temp but it depends on ambient temp. and engine oil temp) This creates high amounts of exhuast backpressure supposedly causing your engine to be able to warm up faster. The effectiveness of this has been debated and I myself (i have removed the valve completely)have found no difference in warm up times. Furthermore the valve is supposed to open when you accelerate letting your engine operate normally, and close upon idle or light accleration and of course deceleration. This is why when its cold out and the engine is still cold, when you let off the throttle it feels as if the brakes are being applied. Anyway does this phenomenon stop after engine reaches normal op. temp? If not perhaps you have a bad sensor of some sort. Easy fix: unplug the two prong connector at the base of your turbo (its the only wires running to turbo) This should temporarily solve your problem until you decide to remove the valve or fix it's problem. Hopefully I explained this well enough...
from your username i suspect you are a farmer? So am I, except I run IH sorry... good luck

 

I purchased my PSD in Oct and recently it got cold enough to use the EBPV. I did notice a decrease in warmup time but no matter how much throttle I gave the EBPV did not open and the perfomance sucked. I did not wait for it to open by itself and pulled the tuck over and shut it down. Once restarted, the performance was regained.

 

Hey man thanks alot for your help Ive been tryin to figure this problem out since last winter. Ill do what you suggested and I and thinking of takeing the whole valve out. Is it a easy job to remove?
Thanks again

 

hey, mine does the same thing. only when it is below 40 though. mostly at 1000-1500rpm, seems as if it is running lean to me. i will check that muffler bearing!

 

lol, yeah gotta watch those muffler bearings! Removing the ebpv is fairly simple. Do a search on gutting the ebpv and ample directions and information can be found. i gained some cool sounds and a little performance when doing mine!