No throttle and rough idle after turbo horn

[Abelshuman]

Installed new turbo horn and now truck idles rough and barley has any power. Won’t rev up just stumbles and smokes white and smells like fuel. Tan completely fine before. Put old horn back on and same thing. I’m thinking I damaged the pressure sensor when I unplugged it? New sensor has been ordered map and baro pressures don’t match while engine is on. When I give it gas the fuel rail pressire and desired pressure both drop but match.

 

[MrMarty51]

Hello Abel. Welcome to the forum.
What make, model and year a rig is we working on today ?

 

[MrMarty51]

You might buy or rent a vacuum gauge and hook that to Your vacuum pump. See if it is supplying vacuum to the proper components, mainly the turbo solenoid control valve, if this truck does have one of those.
Without vacuum the wastegate can not control the boost and then there will be nothing but black smoke emanating from the exhaust.

 

[Abelshuman]

Hello Abel. Welcome to the forum.
What make, model and year a rig is we working on today ?

2004 Silverado 2500 duramax. LB7 motor

 

[MrMarty51]

2004 Silverado 2500 duramax. LB7 motor

Okay. I’m not too much familiar with those enjuns. Hope someone that knows about such things will come along shortly.

 

[dbrannon79]

Welcome to the forum @Abelshuman

I'm not familiar with these engines ether, but looking at the two pics you posted, the baro reading and MAP readings you are pulling a vacuum on the intake where your turbo is not spooling. you mentioned "Turbo Horn" a term I am a little confused by. are you talking about the turbo impeller housing on the intake side? have you verified if your impeller is not against the housing causing it to be stuck and not spinning?

Maybe post some pics of what you have done and whatnot. maybe we can better help and see what's going on.