Need help, no one know what to do

(2003 cavalier auto, ecotec)

I just put in my RKsport intake. It sound great, but when I was driving down my street to test it out three lights came on (service, theft & check gauges) I was told just to drive it and it would go away so I drove 80 miles and just got back from it. IT DID NOT HELP AT ALL. More lights came on (abs, trac off, air bags for a sec). This is the part that makes me think that my battery or alternator is going dead. My outside/inside lights are dim and when I hit a big bump driving, it comes on for a second or when I use my power windows the lights go dimmer. One more thing, all my gauges drop down to zero other then gas when I'm driving and I know that the car is running and I know I'm not going 0 mph. ANY HELP WOULD BE GREATLY APPRECIATED

Take it to the shop.

I would make sure you didn't disconnect anything. I once unhooked my AIT sensor and forgot to plug it in and it threw codes and light's came on. First thing when ever you have problems after a mod is check the mod. Check for unhooked sensors and harnesses. Maybe you needed to disconnect or maybe you hit them with your arm. If nothing is disconnected return car to factory setup and see what happens. You may have to go on several trips before codes will reset. Good luck

I Found Out What Was Wrong With The Car. My Friend Was Helping Me Take It Off (intake) And When He Did, He Put The Ground To The Battery So That I Could Not See It And Long Story Short I Did Not Put It On In. Thanks Tho Everyone