Turbo makes HORRIBLE ROARING noise till fully warmed up!!! - Diesel Forum

2shus · 01-16-2007, 10:09 PM

I have only had this truck a month or so and not driving it daily. When it is cold and I start the truck the turbo roars HORRIBLY LOUD out the tail pipe if you revv it up and hold a steady speed. At first I thought it was the clutch fan kicking in!! If you drive the truck then it only does it when you hold a steady speed. Its very annoying on the highway. It does not do it while accelerating, only at a steady throttle. It quits completely when it gets fully warmed up. It is running a straight pipe that exits in front of the rear wheel. What the heck is this all about? I had the PSD van for 4-5 years and it never did anything like that. Should I be worried about it?

jyrks · 01-16-2007, 10:13 PM

that would be your exhaust back pressure valve. not to worry.

**action4478** · 01-16-2007, 10:14 PM

[ QUOTE ]
I have only had this truck a month or so and not driving it daily. When it is cold and I start the truck the turbo roars HORRIBLY LOUD out the tail pipe if you revv it up and hold a steady speed. At first I thought it was the clutch fan kicking in!! If you drive the truck then it only does it when you hold a steady speed. Its very annoying on the highway. It does not do it while accelerating, only at a steady throttle. It quits completely when it gets fully warmed up. It is running a straight pipe that exits in front of the rear wheel. What the heck is this all about? I had the PSD van for 4-5 years and it never did anything like that. Should I be worried about it?

[/ QUOTE ]It sounds like the normal operation of the EBPV , You can unhook it , gut it ,wire it open if you wish, It is designed to speed the warm up of the motor...

johndeerebones · 01-16-2007, 10:15 PM

It is the exhaust backpressure valve, its there to help with warm up, sounds like its working like it should. Your van never did it because they do not have them, I think mainly due to fitment issues. You can unplug it to stop it, it can be dangerous this time of year on snow and ice. There is a two wire plug right under the compressor housing of your turbo, just unplug it and no more trouble. Won't set a light either, so no worries.

**DIESELDUTTON** · 01-16-2007, 10:19 PM

Its normal and from what I have read the vans dont have the ebpv. Becareful on icy roads if the valve closes it can lock up the rear wheels, kinda acting like a exhaust brake. Good luck

Frank

2shus · 01-16-2007, 10:21 PM

Well I am glad to hear that!! After having the PSD van for years I am still learning new things about these critters. I didn't know the van didn't have one [img]/ubbthreads/images/graemlins/shrug.gif[/img]
Thanks for the help and fast replies, Tim [img]/ubbthreads/images/graemlins/warmsmile.gif[/img]