is something wrong...?

out of my back left brake and wheel smoke was coming... smelled awful... i was just messin around on some backroads...it calmed down after a bit but its a new car for me and i dont knoe if my brakes were just gettin used to hard or if somethin serious mite be a problem
1996 240sx se

my idle on the car is also rough... it goes from like 750 up to a grand and then down to 750 over and over... is that bad and is there a way to fix it?

the smoke is your brakes smoking from braking hard. it does that with hard drivin sometimes. it also does it if you drive with the e brake up, or have one binding brake caliper.

about the idle, check for vacuum leaks.

you running your ac? mine does that when my ac or heat is on.

yah i noticed when i was in it today that i didnt have the problem unless i did somethin usin a lot of battery... i just got the car yestarday so ill have it looked at and make sure everything is good

agree.

one of hte vacuum lines that goes to your idle air control valve must've came off. try looking for the vac line near the throttle body. it should be a pretty one.