Boost control valve ?

[Neelsonwheels]

I was trying to figure out a high idle issue which only show itself when the truck is warm.
I posted pics of the new setup this morning and went out to trace the vac lines. When I started tracing the lines from thr greddy control valve to the turbo I found the line was severed just shy of the clamp. I checked both lines the one that was cut and the one to the wastegate. Both seemed fatigued so I replaced both. Could this cut line be the cause of a high idle? Also I am pretty sure this was the reason I had limited boost. I appreciate any input guys. Also any help with finding a tuner of Bigstuff I would be forever thankful.
Jeff

 

[5678TA]

Re: Boost control valve ?

the boost solenoid only controls spool up speed and total boost psi. your high idle is from something else. check timing perhaps?

 

[Neelsonwheels]

Re: Boost control valve ?

I'll take pics of the valve.
It says greddy right on it.
The lines go from the valve to the turbo and from the valve to the waste gate.
I have a greddy boost controler in the glove box. The truck is controlled by bigstuff3.

 

[Neelsonwheels]

Re: Boost control valve ?

These are the shot of the boost control valve.
The cut wire was from valve to turbo.Not from valve to wastegate.



View attachment 4742

View attachment 4743

 

[Quickstop [UK]]

Re: Boost control valve ?

I have the Greddy same as you (Spec BII?) and if you have no air going to the wastegate then you'll get low boost.