It's lean. Check for vacuum leaks, and make sure the fuel supply is functioning properly.
Clean the carbeurator and lube the throttle cable.
could be a vacuum leak, or throttle positioning sensor
No
Yes it can.
I don't think your asking the Q right it must be the engine doing it, maybe egr
Sounds like a vaccum leak
I would check the ignition timing and set it to the desired specifications. Next I would clean the throttle plate.
lack of fuel
Yes. When you suspect it is clogged, replace it.
bad fuel bad spark plugs incorrect timing
water in the fuel can cause an idling motor to sputter and/or die.
a rapist in your trunk