caa78is Report post Posted October 22, 2009 So I decided to put a sub in my car.and I needed to put a amp wire through the firewall done it plenty other times. Drilled the hole (Just to the upper left side of the steering colum. Now my brake pedal is hard and it wont accelerate past 4000rpms. I think I really screwed up. What did I hit? Quote Share this post Link to post Share on other sites
xmech2k Report post Posted October 24, 2009 While I couldn't help answer your question, as you haven't mentioned what year or model or anything your car is, and I think you'll need real heavy duty car mech for something like this which I'm not, I was wondering if you found out anything yet? Any luck? Sorry to hear about the problem. You've got to be real sure when drilling something like that, or you're just rolling the dice. Quote Share this post Link to post Share on other sites
Rob916 Report post Posted October 25, 2009 My guess is you hit the vacuum booster and now have a huge vacuum leak and no brake assist. Quote Share this post Link to post Share on other sites
