electrical devices stealing vacuum?

[jt15833]

when i turn on my heater/ac fans to 2,3 or 4 my vacuum drops about 1~2 in. hg. Also, since i've installed my electric fans, ive never seen the vacuum I used too. when i switch them to high it's even worse. only thing i could think of is they make alternator need to produce more making more of a load on the engine. any way to fix this, or is this unheard of?

[Not_a_sr]

its probably because when you switch those things on tha idle drops due to the extra load on the system, might be time for a more powerful Alternator,or have that one tested.