reset the computer, now my boost gauge is more accurate than it was when it wants to work, engine runs fine at low speeds, when im in forth gear on the freeway the engine is really knocking real bad, 1-2-3 gears still wants to really struggle to gain power after 3,000 rpms, when let it idle, my lights get kinda dim at night especially when the fan kicks on, the lights brighten up when i gain some speed, it seems to want to run a little better after i unhooked my 4,000 watt stereo going to try a different coil pack I have new Bosch wireset might also put some ac delco plugs in cause there are bosch goldplus in my car plugs damn 1 autozones recommend previous owner replaced the alternator