Vaccum Line Routing

ASSISTANCE Hybrids & Advanced Aftermarket Engine Performance
1

Hey guys,

I haven’t updated my build thread yet but the motor is in and running! But I have some issues.

I have an obd0 (converted to obd1) b16 vtec head on my b18b block, sitting in my 91 da. I need to know what emissions and vacuum routing I can remove, as well as what I should hook up where. It’s a total mess right now, and I’m sure things are hooked up wrong.

So far the dashpot and egr have been removed. But I need to know about the purge valve and stuff on the firewall, as well as whatever the no. 2 control box is and if that’s needed. Pretty much I need clarification on the whole vacuum routing!

I’m at a loss, it’s hard looking at vacuum diagrams that are barely detailed and trying to put it all together.

Can anyone help me figure out what can be removed and where I should hook all my vacuum lines?

It would be very appreciated.

Thanks!

  • Brandon
2

all you need is the map sensor. all the rest can be removed.

3

So the FPR purge valve, other solenoid on the firewall canister can be removed? How is the FPR regulated then? Also, what can I do with the No. 2 box? unplug it and remove it??

4

Im interested in this thread too. Also, when you remove those vacuum sensors, where / how do you plug off the vacuum lines (if at all)?

5

Yes, then take the plug and tuck it somewhere inconspicuous.

you have to plug any open vacuum lines! there are little rubber caps that are made specificly for this job

6

If you follow most any vacuum line from start to finish, you can typically remove the stock configuration and install a new line in a “tucked” fashion… that helps clean up the bay a ton.

It really depends on which intake manifold, throttle body, and intake you use… Many different years/models have slightly different layouts, making a write-up difficult to create and be totally accurate.

Once I got my mix-and-match parts together, I followed the vacuum diagram under the hood, and tried to copy that in the best fashion possible. Same thing with coolant lines when you swap a motor.