Noise from turbo??

[LouisvilleFire]

I've tried to read everything I can about wastegates and the exhuast backpressure sensor. When I first start my turck up when it's cold outside(under 30 degrees) There is a whooshing sound from the turbo area. It will come and go with the as you give it fuel. You can hear it at idle and when it levels out on the road.
Thanks
Tim

[mschn99]

Originally Posted by LouisvilleFire

I've tried to read everything I can about wastegates and the exhuast backpressure sensor. When I first start my turck up when it's cold outside(under 30 degrees) There is a whooshing sound from the turbo area. It will come and go with the as you give it fuel. You can hear it at idle and when it levels out on the road.
Thanks
Tim

thats your exhaust backpressure valve.....thats normal operation.....

[LouisvilleFire]

I have had my truck for 3 years and never heard that until the last month or so. It doesn't do it all the time either?

[Glasseater]

it should do it whenever your truck is cold, like below the C mark

[LouisvilleFire]

this is the first time I have ever heard this noise, it is a continous noise unless I give it fuel, and then it come back when the motor levels off at any speed

[mschn99]

Originally Posted by LouisvilleFire

I have had my truck for 3 years and never heard that until the last month or so. It doesn't do it all the time either?

it only does it under certain conditions, engine oil temp has to be below 32 degrees if i remember off of the top of my head correctly

[LouisvilleFire]

That would be right for the temp, but should it be a continous noise?

[mschn99]

Originally Posted by LouisvilleFire

That would be right for the temp, but should it be a continous noise?

yes...at idle untill engine oil temp reaches whatever the computer turns it off at, its used to create and exhaust restriction to warm the motor up faster...

[LouisvilleFire]

okay, I trust you, but I just can't remember hearing this before.
I did get a wastegate not detected code about a week ago, but it's not shown it since, so I didn't know if the problems were connected.