Sometimes the EBPV will malfunction and close when they shouldn't and won't open when they should. This is why most of us delete it all together.
'97 Turbo Problem
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'97 Turbo Problem
I am new to owning a powerstroke diesel, and I think I know that my problem lies in the Turbo. This only occurs when it is below freezing and or wet out. I fire up the truck and let it warm up for a bit. When I put it in Drive and accelerate, the turbo won't engage and just hisses as I take off at lower RPM's. You can feel the truck is just using the engine power and no turbo. If I speed up, or more RPM, the turbo will engage. But, if I let off the pedal it will start hissing again and the power gets noticeably different. Once I run it for a bit (5 or 10 minutes), it begins to work fine. We had a really wet and windy snow day a few weeks ago, and that is when I started noticing it. It only does it now in the morning, when it is frosty and cold. I didn't seem to have this problem before the snow day. I replaced the air filter, but it still did it again this morning. I am assuming that I have some water somewhere that it shouldn't be, but don't know a ton about these things. I was hoping that someone on here could point me in some logical places to look if it has happened to anyone before. Any suggestions will be helpful.
Fleet Mechanic
Joined: May 2011
Posts: 1,414
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From: Thornhill , Ontario
What you seem to be describing is the EBPV working as it should....Completely normal....
http://www.thedieselstop.com/faq/949.../ecsd/ebp.php3
http://www.thedieselstop.com/faq/949.../ecsd/ebp.php3
Postmaster
Joined: Sep 2007
Posts: 4,195
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From: Medford Oregon
On cold mornings there is a valve (EBPV) that partially closes just after the turbo. It is designed to help rapid warm up on those cold mornings. It does work but is somewhat a pain to deal with. Just below and in front of the turbo you will see a two wire connector. If you unplug it then the function will be disabled. Won't hurt anything as many of us have it disconnected.
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Joined: Jun 2010
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Hi MTelkguide.
There are tons of more knowledgeable guys here than myself, but I'ld suggest doing some reading on EBP or EBPV.
There is a simple butterfly valve attached to the turbo housing. It is controlled by engine oil temperature and closes to help the engine warm up faster, but when it sticks, you get that ridiculous hissing sound and absolutely no power.
The valve is on the passenger side, a cast housing with a pivot going thru it. You can unplug the control to the unit to see if its the inssue. On the Drivers side of the turbo hidden in the back there is a soleonoid with 2 wires, unplug those before you start it next time and see if the problem goes away. On my '95 the plug is clipped to the lower drivers side of the turbo (aluminum fresh air side). The EBPV sticks sometimes....
Im sure the others will chime in soon, they have been a great help to me this past week getting my old 7.3 on the road to recovery.
.02c
Tim
There are tons of more knowledgeable guys here than myself, but I'ld suggest doing some reading on EBP or EBPV.
There is a simple butterfly valve attached to the turbo housing. It is controlled by engine oil temperature and closes to help the engine warm up faster, but when it sticks, you get that ridiculous hissing sound and absolutely no power.
The valve is on the passenger side, a cast housing with a pivot going thru it. You can unplug the control to the unit to see if its the inssue. On the Drivers side of the turbo hidden in the back there is a soleonoid with 2 wires, unplug those before you start it next time and see if the problem goes away. On my '95 the plug is clipped to the lower drivers side of the turbo (aluminum fresh air side). The EBPV sticks sometimes....
Im sure the others will chime in soon, they have been a great help to me this past week getting my old 7.3 on the road to recovery.
.02c
Tim
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Thanks a bunch guys. I'll play around with the EBPV and see if that is truly the issue. Just seems like it takes an abnormal amount of time to warm up. Though I have nothing to compare too, so maybe it takes a long time for this to warm up and function like normal.
Posting Guru
Joined: May 2011
Posts: 2,303
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Welcome to FTE! Like Bill said, many of us have the whole setup-valve, wires, actuator and all- deleted. Simple way is to unplug it. Trust me, you will NEVER miss it.
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These trucks take a long time to warm up. About 20+ minutes on a hot day and it may never warm up on a cold day until you drive it around for a while. I've had my truck running for an hour with the radiator blocked in the cold and the truck never warmed up to operating temp not even close. Try warming it up for a while and if the truck runs better the ebpv is working. The actuator rod can be adjusted. Mine had to be adjusted. Even if the valve is slightly closed it will cost you a noticeable amount of power.
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So I took it out this morning, was about 27 degrees when I left the house. I started the truck and let it run for 20-25 minutes. As soon as I backed out and started up the driveway, it started hissing. I drove it down the road for almost another ten minutes before it started working normally. I am not sure where the plug is exactly to disconnect it. I see a set of wires that connect to the hose that comes out of the air filter, right in front of a big metal part. This is how much I know about these turbos, not much at all.
Postmaster
Joined: Sep 2007
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From: Medford Oregon
So I took it out this morning, was about 27 degrees when I left the house. I started the truck and let it run for 20-25 minutes. As soon as I backed out and started up the driveway, it started hissing. I drove it down the road for almost another ten minutes before it started working normally. I am not sure where the plug is exactly to disconnect it. I see a set of wires that connect to the hose that comes out of the air filter, right in front of a big metal part. This is how much I know about these turbos, not much at all.
The issue here is just idling won't correct the problem. At least on the 97 PCM (code) you need to bring the EOT up to +170* on continuous driving before the PCM disables that function. If you can gt the EOT above 135* then do a shut down and restart then the PCM does not care about that function and the issue goes way.
So, take a deep breath .. everything is working as it is designed. Nothing is going to break. I actually like the system if you understand how it works, everything is working as designed, if you want to put up with it.
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If you do unplug it make sure the valve is open on the turbo. I could be wrong but I would fully warm it up first and unplug it when its running like it should. Make sure the valve actuator arm is fully against the backstop under the turbo.
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Joined: Oct 2009
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I agree if its working like it should leave it alone. I disabled mine not expecting to move to a cold climate. It will heat up the engine and heat up the cab quicker if working properly. I just know mine wasn't working unplugged it than saw the adjustment on the actuator rod. Should have just adjusted it.
Hotshot
Joined: Dec 2005
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From: Chino Valley, Arizona
So I took it out this morning, was about 27 degrees when I left the house. I started the truck and let it run for 20-25 minutes. As soon as I backed out and started up the driveway, it started hissing. I drove it down the road for almost another ten minutes before it started working normally. I am not sure where the plug is exactly to disconnect it. I see a set of wires that connect to the hose that comes out of the air filter, right in front of a big metal part. This is how much I know about these turbos, not much at all.
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