The bottom port on the EX goes to the engine mount.

The LX/DX vacuum routing is different.

 

wow, way wrong thread. sorry.

 

PAHonda your the man with that vacuum routing diagram because all the ones i have seen did not show the names of the items they went to and the middle port on mine is going to the vapor canister not the cruise control so that is going to help me out alot right there because i believe that is where the MAP sensor code is coming into play because they didnt know the routing diagram and just connected everything randomly on there so if that fixes it dude your going to gain some huge kudos with me lol.... but i also went out today just incase and got a coolant temperature sensor from my job to replace the old one because like everything on this car is original

 

So i went outside today to look at my vacuum lines and everything and i discovered as i was going through the vacuum line check that all the iar valves and gas recirculation valves are not connected at all properly so i have to go tomorrow hopefully and change everyone of the lines but after that i think that will fix my MAP sensor code and hopefully fix my car so wish me luck

 

Good Luck! You should also find a vacuum hose diagram on the emmissions sticker on the underside of the hood.

 

Ya this car was kinda wrecked in the front so they replaced the hood and the motor so they dont have the sticker on the hood but imma try to fix to fix it today when i take it to a shop and put it up on a ramp and have t in the air so i can see under the hood and on the top to make my life a whole lot easier