Well I am half way through my MPFI swap, and i have most of my wiring done, and by tomarrow morning i hope to be done wiring, my problem is that I am rather confused as to where my vaccum lines are going... The SI manifold is a little different, and i just need a good diagram or some pictures would be super awwesome. If anyone could help me out that would be great. I did a search on this site but most fo the pictures had broken links... Also another quick question, I am supposed to take the blue and yellow wire from the Cylinder Position Sensor, and move it to a pin on the C plug, where is this wire, is it the wire that plugs in the EVAC???? Also there is a blue and green wire that is supposed to be plugged into the C plug where is that one too???? thank you in advance for your responces.

Man i just came up with another question (sorry, way to organize my thoughts) what is the difference between th SI and DX distributor???

Thanks,
Eric <--- 89 Civic DX 5speed

 

the blue/green and blue/yellow wires are from the CPS in the Si distributor

 

thanks man, i figured my wiring out last night after this post, i found a great wiring diagram on this board...
https://honda-tech.com/zerothread?id=386726

I am still in need of a vaccum line diagram for a civic SI or a DX to SI diagram, please I am mid way through this project and have 3 lines i am rather confused about still. Also if someone could explain the difference between the SI and DX distributor besides the plug shape that would be great.
Thanks

 

the Si distro has the crank sensor in it to tell which cylinder the injectors should squirt. the DX doesn't since it only has two injector located just under the TB.

thats a basic, straight forward answer.

 

sweet thank you so much for your quick reply...
Now all i need is a vaccum diagram, also from the few pics i have seen that do not show me what i need, my manifold has 2 places for vaccum lines on the front of the throtle body, most pics i have seen only have one and it goes to the middle of the manifold.... please some pics or some diagrams of the lines would be much apprieciated.
Thanks.

 

from what i can remember the lines coming out in front of the TB one goes to the red braided line coming from the charcoal canister . the other one goes to the map sensor located on the firewall.

then there's the 3 outlets sticking in front of the plenum part of the manifold.
(from the left) the first one goes to the vacuum diapraghm. second one i think is a coolant line. the third one goes to the FPR.

 

ok the one that goes to the coolent line is the last one i need to hook up to be done with the swap... the question is where does it hook up to???? i have a good idea, but if i hook it up to the port next to injector #4, where do i plug the link that is attached to the line that goes from the vavle cover to the intake???
Thank you all for your help...
-Eric