my 1997 was doing that but I also had a temp gauge that fluctuated alot while driving.
I replaced my thermostat and it fixed both problems.

 

I will try those steps, but they seem complicated! I will try over the weekend when I have some good solid time! Is this a problem, where if I don't fix for now, could become progressively worse..?

Also, someone who knows my car mentioned that my car's engine is over clocked, and that this issue is directly related to this. He says that the rpm's revs so my car doesn't turn off, and this was done for a cheap fix that covers an underlying, and more serious problem. When I drive, at the very lowest speed, my car is always atleast 2 rpms, and I have never driven at 1 rpm.