Ok I have not been able to check the turbo out yet, but when I step on the gas and the turbo spools up it sounds like a high pressure air leak, let off the gas and spools down the noise goes away. I have put it in Neutral and step on the gas nothing, I only here this noise in all driving gears and four weel drive.

 

Have you checked all the intercooler boots and make sure that one hasnt popped off or has a leak

 

No I havent nor do I know how to. Any tips thanks in advance guys

 

Just gotta get in there and look. The boots (4 I think) connect to the tubes that carry the boost from the turbo to the intercooler. And next from the cooler to the intake. Look them over closely for rips/tares and tighten the clamps while you are in there. Afterwards, drive the truck and see if there is a change. Let us know and good luck.

 

You can make a cheap tester with a 4" rubber plumbing hose, a 4" ABS pipe plug and an air hose fitting. Drill and tap the plug, slip the plug into the hose and clamp it up. Remove the air hose on the turbo and clamp the tester on. Pressure it up to about 20 PSI and spray all the boots and connections with soapy water. Any leak will show up.

 

check your wastegate actuator pressure line.

 

Ok thank you guys I will check the conections over and let you know how it went.

 

f course, it could just be turbo whine...normal

 

keep us posted on what you find i think alot of us have the same problem and just can't find the source.

 

Havent found anything yet, but if the silencer ring broke inside the turbo would it make that noise? It sounds just like someone is leting air out of a compresser when I step on the gas.