Well guys i dont know what happen to be making 15 20 lb of boost.

I have a t76mm from trick performance with a 6 lb spring on a 2010 5.3, The truck was working good airfuel at 11.5 timing at 12.

This happen after i install the boost gauge so i start looking for a leak and found it. Its was on the hose that goes to the boost gauge I fix it but it still over boosting.

Today i went under the truck to check the wastegate and found this, I dont know if this is the problem. Theres a crack and theres signs where is leaking where the wastegate sits. Can that make my truck over boost? Or the boost gauge is not working right? I dont want and try a long WOT run to see if my air fuel gauge goes lean, Not trying to blow the motor.

 

Is the waste gate opening properly? Mine was stuck and causing mine to over boost.

 

Did not check that part, How do i check it, do i press the piston that its under the watsegate?

 

What kind of WG and how do you have the vacuum line hooked up to it?

 

39mm precision, the vacuum line its hooked up on the side of the intake.

 

No, which port on the WG is it hooked up to (top or bottom)?

 

The bottom port.

 

A leak should make less boost, not more...

What were you making before? What have you changed since then?

 

Need to weld up that crack. It's under warranty if you send it back we can do for. Just pay the freights. Or a local muffler shop might charge less then the freights.

 

Just te boost gauge.