2015 all stock boost issue.

[cranky1]

My 2015 has been making a whistle sound from 8-13 PSi. So I locked it into 6th pulling around 3000 lbs, when i hold the gas to the floor it slowly builds boost then hangs around 10-12 pounds for about 3-4 seconds then goes from there. The truck is all stock and the whistle appeared about 2000 miles ago. Possibly a boost leak? Need opinions and the truck is still under warranty.

 

[6.0 Tech]

Check your exhaust manifolds. Get a mirror back there, you should be able to see soot under the heat shields. Pretty common for them to break one or both rear studs on either manifold.

 

[cranky1]

Thank you, I had a dealer look at it. They drove 1/2 a mile and said nothing was wrong... am halfway looking at dodges, I have 3 buddies that are cummins certified on big trucks.

 

[bdm1981]

Thank you, I had a dealer look at it. They drove 1/2 a mile and said nothing was wrong... am halfway looking at dodges, I have 3 buddies that are cummins certified on big trucks.

Thats a step backwards. I wouldn't trade your truck for a cummins just because you have a little issue with your truck. Me personally take it to another dealer for a second opinion. From the way it sounds it is just a minor problem that can be fixed. More than likely it is what 6.0 Tech just told you. I've seen quite a few of these trucks do the same thing he just mentioned. Just my opinion...

 

[cranky1]

I'll get in there and look once it cools down, the motor makes more noise when it's hot. I'm just frustrated after averaging 13nog over 190 miles with a rzr on a 6X12. Trailer. It did much better with 5000 miles on the of then it does now with 15k. It's a rclb 4X4 with 3.31 gears.

 

[6.0 Tech]

Exhaust leak pre turbo or turbo issue will cause mpg to suffer...

 

[Tom@BigTimeKustomz]

Thank you, I had a dealer look at it. They drove 1/2 a mile and said nothing was wrong... am halfway looking at dodges, I have 3 buddies that are cummins certified on big trucks.

Go back to the dealer and take the tech or service manager for a ride, you driving, and try to bring the problem up then. Or find a new dealer where the service people give a sh!t and want to help you.