when i turn my lights on or hit my brakes or anything that uses some power....my idle drops down....what an cause this? anyone ever have same problem? bad ground? bad battery or alternator?
Rob

 

All of the above. Clean and tighten all of your grounds, clean off your battery posts and terminals. Then, if you have a multimeter, check your battery voltage, and check the voltage with the car running. Running it should be 14-14.5.

 

Yeah, check all that stuff... If not, there should be a electronic load sensor (if I'm not mistaken) that reads the load on the battery and compensates for the drainage of voltage by bumping up the idle... HTH

Dan P.