The manifold was installed by a friends friend on my friends car, if you follow that then we are off to a good start. alright, now the problems begin. The car does not feel like vtec is engaging, infact, it doesnt even pull now, the car is a slug. Both the vti and vto lights on the vafc both turn on at the same time. it has never done this before, and the car also went through 3/4 of a tank of gas in 100 miles, a bit extreme? and also, the tach skips all around now. and on the back of the manifold, to the far right there is a plug that is just capped off, on my itr swap this line is in use, well any help would be appreciated.

i had to cap off that line on my gsr too. sounds like something is wrong with the setting on the vafc. did anyone change the setting on the vafc. the vto might be set at the stock setting, so the vti wll come on at the same time as the vto. try raising the the vto, somewhere around 5000 rpm. and the fuel setting might have been set to rich. it maybe a good time to dyno tune the car.

its not the settings, its just not engaging, i rechecked the whole vafc next to mine, and its exactly the same, any other suggestions?

not that this is a solution to all of your problems ... but you should always properly reset the ECU anytime you make a modification to the Airflow, Fuel, or Spark

The ECU will recalibrate itself. Maybe better gas mileage and performance then