I am finishing up my project and motor swap, got a question though. I have absolutey no emissions, and I am running a Haltech E6k. No OMP either. The thing is, I only have 2 vacuum lines on the entire motor. A little one that goes to the fuel pressure regulator and a little one from the wastegate to turbo. I know I have no emissions or anything, but there has got to be more than that! I am not talking about brake booster lines or any of those though. Just the engine vaccuum lines.

 

You need ones to the fuel pressure regulator, and if using a haltech, the map sensor. You also need one going to the BOV. The turbo's wastegate actuator can get it's signal from the turbo compressor housing, OR you could choose to run it off of manifold pressure which is less common but still work fine.

 

You should also install the fuel injector air bleed lines. They improve fuel atomisation, which improves combustion efficiency.

 

What are the fuel injector air bleed lines? I havent heard of those.

 

On s4 t2 engines it's the small vacuum nipple on the LIM between the 2 oil injectors. IT feeds the small drilled air passages adjacent to the primary fuel injectors, and supposedly changes the way the fuel atomizes for better efficiency and smoothness. I am sure there is some minute difference, but I have personally not really observed much of a change when it is capped off versus left plugged in.

 

Is that s4 engine only? Mines an s5 TII...

 

Series four have air bleeds for the primarys.

Series five have air bleeds for primary and secondary.

See your local FSM.