My engine seems to be moving a bit much when I let off the gas, it kinda rocks back and forth like it is going to stall, so I thought I might need new engine mounts, but I don't know which one or ones to replace. How can I find out?

 

I had engine mounts go bad on my Del Sol and you could see the rubber was cracking and pretty worn out. If it is a motor mount it should be pretty easy to tell.