Not all cylinders working

So I get out of class this last week and 2 other friends and I were going to go get some food to eat...and I started my car and it was ideling. ANd one of my friends says dude, I think one of your cylinders isn't working. So I questioned him on how he knew and he said he could tell by the sound of my idle. Is this true? How would I know if one of my cylinders wasn't working?

You can hear the skip in the beat.

well if one of your cylinders wasn't working then your check engine light usually comes on. also you can usually tell. you get a LLLLLLLLAAAAAAAAAGGGGGGG. i dealth with a 1st cylinder missfire for 6 months (till the motor blew) and trust me you can tell if a cylinder is out,

You can hear the skip in the beat.

Yep, along with severe vibs in the steering wheel. When you try to accelerate there is no power and the car surges. Been there before. Damn GM coil packs... LMAO..
:sly:

Ok, my car don't have any of those symptoms so i think im good. Thanks for all yoru help.