CRX B18a1 vacuum diagram

4 Jul

Back by popular demand, a wiring diagram for the obd0 b18a1 in an MPFI 88-91 CRX (that’s HF and Si, not the DX). This should also apply to EF/ED Civics, but I’m running on memory here and don’t have a car to verify this on.

If there are any questions or corrections (as I’m sure there will be), feel free to leave them in the comments.

Comments 3 Comments
Categories Garage
Author Jesse O'Brien

3 Responses to “CRX B18a1 vacuum diagram”

Rhys April 27, 2011 at 6:06 pm #

Is this the same as the b16a1 set up in a crx hf 89? It looks really similar, there’s a few capped tubes and pipes in the bay and i’m trying to find out what is what and whether they were done right by the previous owner.
Cheers

Reply
- Jesse April 28, 2011 at 2:41 pm #
  
  It’s not the same, only vaguely similar. The b16a1 intake manifold is completely different, and has fewer vacuum connections on it. I believe you want this diagram:
  http://www.hamotorsports.com/b16a1-vacuum-diagram.html
  
  Reply
Rhys May 7, 2011 at 6:06 pm #

Awesome thank you!

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