The SAI system’s disposal has a number of negative effects. However the engine is hot or cold, the SAI system has no impact on how it starts. The SAI system’s goal is to decrease start-up emissions by assisting the catalytic converter in reaching operating temperature more quickly. This was required in order to grant the 1.8T a ULEV rating.
If your VR6’s secondary air injection system is giving you problems or if you simply want to make the engine systems simpler, read this. Without changing anything in the engine’s head, the Mk4 12v VR6 SAI Plug is the ideal way to get rid of your SAI pump. The SAI Plug failure point is a bit problematic and may or may not provide you years of dependable service, so be sure it is machined from a single piece of 6061 aluminum and has a brand-new high-temp silicone gasket.
How is the SAI system coded?
ME7 software that has been tuned can effectively code out the SAI system. Both stock tunes and other tuning stages are capable of it. It may be coded out in two different ways.
Even though few tuners are aware of it, there is one method that will still let you pass inspection. Massachusetts mechanics employ this technique to pass vehicle inspections. This procedure allows for the removal of the SAI pump and the installation of the block-off plate, but the N112 valve must be left in place.
This method allows the SAI diagnostic functions to run and pass as if the system were still installed.
The alternative way merely deactivates the DTC while turning on the readiness bits. The most typical approach will fall short in states with more modern inspection computers.
Close Guide on 12V VR6 SAI Delete
The specific instructions are outlined in The VR6 12V SAI Delete Guide.
- Find the motor for the SAI pump, which is just behind the radiator. Find out where each line/hose went by following them after that.
- Next, take off the bracket that keeps the pump motor in place. Two bolts secure the oil pan, but just one fastens the cylinder block. They are situated just below the housing for the oil filter. The pump’s harness connector needs to be unplugged.
- Disconnect half of the pressure hose on the side of the engine to remove less hose from the bottom. These hoses can be disconnected by pushing and tugging on them. Take off the pump from the radiator hoses’ base.
- Remove your intake tubing so you can access the Combi-valve more easily. It hurts my neck, but not too badly.
- The radiator hose needs to be disconnected now that you have access to the Combi-valve.
- Although it could be challenging, stick with it and take your time removing it since you still need it. Three bolts are present: one on each side of the radiator hose and the flange of the combi-fitting valve, and one in the centre.
- The ground wire has to be disconnected and moved. The valve cover can be right on top of it.
Axial Inclination in Steering (SAI); also known as the SAI component.
SAI is the measurement in degrees of the steering pivot line as seen from the front of the vehicle. When the steering wheel is moved away from straight ahead, the car rises somewhat because this angle, together with the camber, creates the included angle (see below).
The weight of the car compels it to return to the centre when you let go of the steering wheel after performing a turn. As a result, a pull will happen at relatively modest speeds if the SAI fluctuates from side to side.
Although SAI can often be measured by alignment equipment, it is seldom separate modifiable. The most frequent reason for SAI failure is bent components, which need to be changed in order to solve the issue. SAI is also referred to as KPI on trucks and older vehicles having kingpins in place of ball joints (King Pin Inclination).
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