How do you know you need motor mounts? What signs do I look for?

Not understanding the part of 'pull back hard'. Explain

Need to define problem. I do know I have changed motor mounts on quite a few PT cruisers. Check to see if the rubber in the center is ripped or separted from the housing. Check the 'dogbone' motor mount underneath as well.

motor mounts are a common issue cruizers,if bad they will also brake the a/c lines at compressor.get a good shop to ck them b4 it costs you more $

Raise the hood and apply park brake, have a helper watch the engine, FROM THE SIDE of the vehicle, as you shift it into reverse WHILE HOLDING THE SERVICE BRAKE (foot brake) and give it a LITTLE throttle, does the engine move excessively? Now do the same in DRIVE and look for the same results! That is how I find most motor mount problems... IF manual shift trans. just use the clutch as you give it a LITTLE throttle.