when i put my car in reverse, it seems to die almost every time...i just did a h/c/i (gt40s, e-cam, typhoon) but it would die before i put those parts on. ever since the h/c/i it seems to have gotten worse. is this a major problem??? i have no idea y this is happening but hopefully someone on here does... i have an aod with a hammer shifterby the way

I lose voltage and sometimes my car dies as well, but I have no idea why it does that either???

check for vaccum leaks and rule number 1 never perform a mod on a car that is not performing well to begin with..ie drivibility issues...it only throws more of a wrench into the thick of troubleshooting it now;)