I'm in the middle of a h22a swap in my 95 civic ex and am confused about this emissions diagram.

If you look into the bottom left hand corner of this diagram there is a intake control diaphragm connected to the intake control solenoid valve, which then goes to the intake manifold. I cannot find this intake control diaphragm on my civic and was wondering if it even came with one? Could I just do away with this and cap at the intake manifold? Or how could I make this work? I'm running a P13 Ecu and don't plan on chipping my P28 due to the fact of this swap is already up to about $2600.. I'm pretty strapped for cash

 

the Civic doesn't have it. I don't belive you'll have a code if it isn't present. You should be fine just ignoring it and caping the port on the manifold.

 

It won't effect Vtec or anything else?

 

has nothing to do with VTEC. it's not an input sensor. the ECU isn't looking for it's signal for anything. it's an "output" that is triggered at a given vaccum and/or RPM (i would speculate) for some latent benefit in the original application. some emissions related engineering patch job to get the car to market on time... maybe.

 

The ECU you are using came from a Honda that had variable intake runners. Similar to the B18, it controls the short, fat runners and the long, skinny ones. If you are using a manifold without secondary butterflies, ignore it.

 

I am using secondary butterflies actually.. I've been told just to cap at the manifold and just delete the line going to the intake control diaphragm and it wouldn't hurt anything .. What do you think it would effect?

 

slowcivic hes talkin about the air intake one thats on the air intake side ... its not needed just cap the intake manifold nipple off as has been suggested