[Alex Liu]

Hi,
I got a second-hand BMS JB4 box（wireness/ewg model）for my N20(28i EWG)with four connector as picture shows.
I was puzzled by the JB N20/N26 Stage 1 & JB4 Install Guide on the http://burgertuning.com/instructions/JB_n20_install.pdf which is not the same with my box. Need I connect the all four connector?Or just connect the two for ‘boost’&'manifold'?

[Terry @ BMS]

Looks like it has the optional EWG connector installed on the harness. Doesn't need to be attached to the car.

[Alex Liu]

Originally Posted by Terry @ BMS

Looks like it has the optional EWG connector installed on the harness. Doesn't need to be attached to the car.

Thanks for your reply.
It is for 2014+ 20i engine，looks like already integrate the the four connectors as follows：

1. Boost turbine pressure sensor
2. Manifold intake pressure sensor
3. Fuel high pressure rail pressure sensor
4. Wastegate turbine bypass valve controller（EWG）

My problem is whether the 3 & 4 connectors is needed for my 28i eng(14+ ewg)?
I think these two are not necessary for 28i，but if 28i eng install all the 4 connector to make the engine compartment looks tidy,will any adverse issues occur?

[Terry @ BMS]

1 and 2 are needed. 3 and 4 are optional. Should be fine without them to start on map1 or map2.