Wheezing Diesel
Thread Starter
|
4wd Low
Joined: Nov 2010
Posts: 11
Likes: 0
Wheezing Diesel
I'm driving a '96 F-250 with a 7.3 Turbo Diesel. Lately with the weather starting to get colder, it seems that under a steady throttle, the Turbo is spooling up but not dumping to anywhere. The engine changes pitch a little and it seems as if your foot were dragging on the brakes. The turbo does work because On accerleration you can hear it spool up and the truck takes off pretty well. Sitting at an idle or parked, the Turbo has a pretty good whistle through the unrestricted mufflerless dual exhaust. Has anyone experienced this and if so what the heck is it and how can I cure this?
I've checked the obvious like clogged Air and Fuel filters.
I also noticed this summer that occasionally upon starting, it seemed as if the turbo was already spooled up and would dump immediately. My son noticed this and asked why it sounded like the truck was dumping air through the exhaust.
What's up with these problems?
Thanks for any help diagnosing these little gremlins.
I've checked the obvious like clogged Air and Fuel filters.
I also noticed this summer that occasionally upon starting, it seemed as if the turbo was already spooled up and would dump immediately. My son noticed this and asked why it sounded like the truck was dumping air through the exhaust.
What's up with these problems?
Thanks for any help diagnosing these little gremlins.
Senior User
Joined: Jun 2006
Posts: 183
Likes: 0
From: Wisconsin
Dump? I'm not sure what you mean. A loud "whoooshhh"? The loud wshoosh would be the factory EBPV or warmup valve. If the valve is closing on you it will lose power. There is a connection on the driverside right below the vavle cover near the turbo you can disconnect.
Hotshot
Joined: Jul 2008
Posts: 11,231
Likes: 130
From: Thomasville, GA
Sounds like the EBPV (exhaust back-pressure valve). When it's cold out it shuts off the exhaust right after the turbo for faster warm-ups. It should go away after it warms up or when you get into it pretty good.
If it's staying on you can unplug it (2 wire plug under the turbo driver side) and it will stay open all the time, or you can wire it to a switch to manually engage it.
If it's staying on you can unplug it (2 wire plug under the turbo driver side) and it will stay open all the time, or you can wire it to a switch to manually engage it.
Thread Starter
|
4wd Low
Joined: Nov 2010
Posts: 11
Likes: 0
Thanks both, meant to respond sooner but haven't had a chance to sit down at and check e-mails for a while. You're diagnosis were correct. It is the EBPV. So is it normal for it to take anywhere from 10-15 minutes for the engine to warm up enough to where the EBPV stays open? It's not even that cold yet.
Hotshot
Joined: Jul 2008
Posts: 11,231
Likes: 130
From: Thomasville, GA
The EBPV can be kinda finicky. When I still had mine hooked up it would stay shut for about 10 minutes and wouldn't even shut off when I started driving down the road. I just unplugged mine and left it. I now have a chip with a high idle setting that does the same thing as the EBPV, just warms up faster.
If you still want to have it for quicker warm-ups in the morning I would hook it up to a switch so you can turn it off once you start driving.
You basically just have to extend the two wires from the plug and connect them to a switch on your dash.
If you still want to have it for quicker warm-ups in the morning I would hook it up to a switch so you can turn it off once you start driving.
You basically just have to extend the two wires from the plug and connect them to a switch on your dash.
