i just put the skunk2 intake manifold, and bbk throttle body on my 2000 civic ex. and when i started it the car was idling at about 3500 rpm. so i lowered the idle and then i started the car again and it does that annoying revving idle from about 900 to 3000 rpms
i checked my vacuums i think they are all in the right spot. the gaskets are new. i dont know what else it could be besides the tps sensor. has this happened to anyone? what was the problem? thanks.

 

this happened to my friend's car. you have a vacuum leak. make sure all the intake manifold and throttle body bolts are torqued down.

 

Get some intake manifold cleaners, spray the lines and when the engine boggs down BAM you found the leak. Make sure he intake manifold gasket is on there right, that could easily cause this too. Look and double check that you have all the hoses hooked up.

 

i fixed it. there was a threaded hole on the side of the manifold that needed to be plugged. thanks