I have an 01 GTP only mod as of now is a CAI (HAI if you wanna get technical) anyway its had a surging idle problem for a long time, 3 Vacuum leaks later and thats all fixed but occasionally ill get all my lights to dim. Ive replaced the battery and made sure the terminal connection was tight and im lost. Any ideas? Also my check engine light dosnt come on even though i have had misfires (used scan tool, vacuum leaks were issue)