ok guy i have 90 crx with 89 crx si harness and my ?? is i am swaping a b16 and i wanna run the plug that are in the firewall to the intake but one of the the plug is differen is the one with 2 cables the one that have 3 is fine some one can help me please

 

If im reading this correctly which I barely understood most of it your referring to where the map sensor and those little solenoids for emissions go...I don't believe you need them the map sensor is the only one that needs to be used just 88-89 probably just had different emissions controls than 90-91...
My 89 only has 2 plug there
I've never owned a 90-91 because I detest door seat belts lol

 

Sorry for my inglish is not really good lol and yes I am taking about the map sensor that the plug in the boron with3 cables and the one in the top u say I don't need

 

You can either get one from a 88-89 or not use it the only one u need is tge 3 wire pkug for the map sensor

 

Thank u