just to clarify i have done many searches on the h23 vtec and i have found some info ie. hp, tq and a few minor stats, but what i am looking for if anyone caould please help me is a vaccum diagram on the h23 vtec, for as anyone who has done the h23 to h23 vtec swap have found, is that the intake manifold has less vaccum ports for my vaccum lines. and the iac is compleatly differnt. if anyone has any info on this and could please give me a hand that would be great.


thanks

 

It's not completely different; in fact, it's much the same.

If you have the diagram for the H23 or the H22, you're set.

 

i found that they were completely different.... the idle air control is completely different along with the mounting point.... the map sensor on the reg h23 has a vacuum line running to it, where the h23 vtec has the map sensor on the throttle body... and i found that the h23 intake manifold has at least twice as many ports for vacuum lines as the h23 vtec... did i maybe get a completely different intake manifold than i was supposed to... it looked factory ie all the wires for the harness (obd 2 which i got with the engine) were in the correct spot and the manifold looks like it was not changed...i don't know

 

The MAP sensor is on the TB of the newer Preludes.

Is this the Japanese Accord SiR-T, or the hybrid one built from the the H23 and the H22?

 

this engine is a jdm out of the accord sir... so i went from obd 1 to obd2... maybe there is a difference...