Two mechanics and I just finished installing a vortech aftercooled supercharger kit and a type R intake manifold on my 2000 civic si. After we were completly finished, we did the final checks; no fuel leaks, no vaccum leaks (as far as we could tell). When we tried to start the car it immediatly started to rev by itself and I had to shut it off before it reached the rev limiter. We spent an hour trying to figure out the problem but to no avail. Does anyone have any suggestions on what might cause this? Any help would be greatly appreciated.

 

Let the engine breath without the stupidcharger to make sure its the engine. Then find the vaccum leak.

 

yep disconnect the asscharger and find the vacuum leak. because you do have one.

 

check your throttle cable and look for vacuum leaks
see if you throttle plate is closed all the way at idle.
sounds like you forgot a vacuum line (brake booster, fuel regulator, check valve)