Problem with Power
#1
02-14-2008, 11:35 PM
Problem with Power
On cold days when I'm first driving down the road I'll step on the gas and I'll hear a sound like "blowing air" coming from down by my feet. I never feel any air in the cab. The power, at this time, is about half what it should be. I'll slowly accelerate and there will be a point when the sound of air blowing stops and the power kicks in to full amount. After an hour of driving it stops. It only happens 50% of the time during the winter.
95' F350 Powerstroke 148 K miles. No mod's.
95' F350 Powerstroke 148 K miles. No mod's.
#2
02-15-2008, 12:04 AM
F350, Welcome to FTE. I think you will find alot of answers here. And I have the exact answer you are looking for.
The noise you hear is you EBPV closing. (Exhaust Back Pressure Valve) It's located on the exhaust outlet (turbine) Of the turbo. It's purpose in life is to help your engine warm up in cold conditions. In other words it's doing it's job. It does this by closing a butterfly much like a carburator butterfly it the exhaust housing on the turbo. However, it's not always needed. You can unplug it, and test my theory. LOL Just look under the turbo where the intake from the air filter meets it. There is a 2 wire plug. That controls the EBPV. With it unplugged, you shouldn't hear the valve close, or should I say the wooshing sound you hear, and you should have full power. Again, welcome to the forum, I look forward to seeing you on the boards.
The noise you hear is you EBPV closing. (Exhaust Back Pressure Valve) It's located on the exhaust outlet (turbine) Of the turbo. It's purpose in life is to help your engine warm up in cold conditions. In other words it's doing it's job. It does this by closing a butterfly much like a carburator butterfly it the exhaust housing on the turbo. However, it's not always needed. You can unplug it, and test my theory. LOL Just look under the turbo where the intake from the air filter meets it. There is a 2 wire plug. That controls the EBPV. With it unplugged, you shouldn't hear the valve close, or should I say the wooshing sound you hear, and you should have full power. Again, welcome to the forum, I look forward to seeing you on the boards.
#3
02-15-2008, 05:55 AM
x2 what Cody said. Let us know if your having trouble finding the connection, I'm sure one of us has a pick near the turbo and can point out exactly where it is. I live in NH were it get a little chilly out, I've had mine disconnected since I purchases the truck. Warms up fine. Again welcome!
-Robb
-Robb
#5
02-15-2008, 05:13 PM