hi am having problems with my type r the rpms are high and then they just drop down and they go back up to about the same spot they just were.
i was wondering if this means i have a problem with my vaccum lines cause the car ran fine like a few days ago untill i put a boost controller in and i changed the injectors. I could use any help
thanks tom

 

sounds like a vac leak. Check what you changed and you'll probably find a problem there.

 

where at in the rpm's is it dropping if its at idle then there r many things taht could cause that,
ex/ hitting brakes, turning the steering wheel, etc.