EBPV and turbo
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EBPV and turbo
Hi again guys. I've been searching alot on my turbo issue I posted about earlier. I can't seem to hear the turbo well anymore. In the midst of my searching, I'm reading a whole lot about the EBPV. Apparently, it likes to get stuck and keep the turbo from spooling?? I've also read in some places that if this thing is stuck closed, it makes a "jet" type sound. Every time I read that though, it was on the 99+ PSDs.
I'm trying to find out if this thing is sticking closed. If it's closed on our trucks, does it make this same sound? Because I have yet to hear this sound on the truck. If our trucks make that sound, then evidently that isn't my problem.
Another thing, if it means anything, the truck is extremely slow when it's cold, and the colder it is the less it's able to idle up when pressing the throttle. It kinda stumbles out.
96 F-Superduty. 200k+
Any help would be VERY much appreciated.
Thanks,
Frank
I'm trying to find out if this thing is sticking closed. If it's closed on our trucks, does it make this same sound? Because I have yet to hear this sound on the truck. If our trucks make that sound, then evidently that isn't my problem.
Another thing, if it means anything, the truck is extremely slow when it's cold, and the colder it is the less it's able to idle up when pressing the throttle. It kinda stumbles out.
96 F-Superduty. 200k+
Any help would be VERY much appreciated.
Thanks,
Frank
Posting Guru
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From: AZ
The jet sound is there (you can here it better with it strait piped), and if you think it is giving you problems just unplug it. It is under the intake side of the turbo and is just a 2 prong connector.
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Another thing, when I press the throttle, I have to press it maybe 1/4 to 1/2 inch before I get a response - is this normal? Furthermore, once I've reached that point of response, it only continues about maybe halfway down if that makes sense. In other words, if the pedals position could be measure from 0-100, zero being idle, and 100 being WOT, I only have response from about 15 to 40. That is when the engine is warm.
The colder it is, the more I have to push it.
Two more questions. I read that these trucks do not have a wastegate. But now I just read that the SuperDuty's DO have a wastegate?? Which is it?
Also, if I were to disconnet the EGPV, do I need to have it open, then disconnect it? Or can I just pull the connector and it will not open?
The colder it is, the more I have to push it.
Two more questions. I read that these trucks do not have a wastegate. But now I just read that the SuperDuty's DO have a wastegate?? Which is it?
Also, if I were to disconnet the EGPV, do I need to have it open, then disconnect it? Or can I just pull the connector and it will not open?
Last edited by f100/1982; Feb 5, 2007 at 10:50 PM. Reason: adding questions
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Okay well, my EBPV (or wastegate or whatever) is fine. I checked my boost on my turbo by hooking up a pressure gauge to the line that goes into my MAP, and went WOT in third gear. Alldata says that at 3k RPMs, I should see a minimum of 15 psi. I only observed 10.
I checked around the turbo for exaust leaks and stuff, and tightened all clamps (none were loose). Does anybody know where I should go from here? Should I take the turbo off and inspect for damage?
I checked around the turbo for exaust leaks and stuff, and tightened all clamps (none were loose). Does anybody know where I should go from here? Should I take the turbo off and inspect for damage?
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Cargo Master
Joined: Jul 2006
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From: Nampa, ID
Sounds like it's time to open the turbo and check the vanes. If they're damaged, that may be why you're not seeing the boost levels that you should.
Another thing, the go pedal, (for my '97 anyway, my book doesn't cover '96), may be electric, meaning no throttle cable to adjust like a gasser. Look on the pedal assembly for a button that is depressed when you step on the pedal. If I understand it correctly, the button should be slightly depressed all the time. This will allow the engine to idle.
You should be able to bend the tang to a position that makes constant contact with the button. I'm not sure how much pressure or how far the button is supposed to be pressed, but there was another thread on here that mentioned this process. You might want to try a search on "accelerator pedal" or something similar BEFORE you begin bending things back and forth on the pedal assembly.
Another thing, the go pedal, (for my '97 anyway, my book doesn't cover '96), may be electric, meaning no throttle cable to adjust like a gasser. Look on the pedal assembly for a button that is depressed when you step on the pedal. If I understand it correctly, the button should be slightly depressed all the time. This will allow the engine to idle.
You should be able to bend the tang to a position that makes constant contact with the button. I'm not sure how much pressure or how far the button is supposed to be pressed, but there was another thread on here that mentioned this process. You might want to try a search on "accelerator pedal" or something similar BEFORE you begin bending things back and forth on the pedal assembly.
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From: Indianapolis, IN.
I unplugged mine today, but I haven't really noticed anything.. I've heard that straight piping these truck is legal. Is that true? Or, does one just need to count on a cop not feeling up to getting down on his knees and checking?
Thanks.
Thanks.
Posting Guru
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From: AZ
Originally Posted by Tofudi
I unplugged mine today, but I haven't really noticed anything.. I've heard that straight piping these truck is legal. Is that true? Or, does one just need to count on a cop not feeling up to getting down on his knees and checking?
Thanks.
Thanks.
Posting Guru
Joined: Apr 2004
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From: AZ
Check the turbos endplay by removing the intake and trying to move the turbo compressor wheel left and right, if you have any play you will need it rebuilt. You might have an exhaust leak on one of the up pipes from the exhaust manifold to the turbo.
Also check the 4 bolts that hold the exhaust housing to the mid section (mine is missing 1 bolt)
Also check the 4 bolts that hold the exhaust housing to the mid section (mine is missing 1 bolt)