It was really nice outside today so i decided to take the evo out.. I started everything was normal, i let it warm up for ten minutes. I left drove to a shell and put 93 in (ouch my wallet). It was running fine, then about 20 miles in, i was at a red light in neutral and my idle dropped below 1, started a weird rumble and my volts dropped significantly. It happened all the way home and actually stalled once. i had to keep the rpm's up to keep it going, i was very scared and had no clue what was going on with the car. I made it home and asked my dad, he said let me hear it and see how it drives, i took him for a ride no problems ran fine, also i went to a friends and had no problems. Im thinking the alternator? ii have no idea though i would love as much feed back as i can get Thanks.
Thanks for reading

 

No its not that it sounds more like your using to much voltage like for example if u have a amp and two 12s and its bumping and your lights are on there going to dimm low and your idle is going to fall because ur using so much juice ....oh and AC makes your idle drop under 1