Those symptoms are what you get from a few things but high on the list is a defective knock sensor or wiring to knock sensor.

The ignition has a diagnostic lead on the inner fender on driver's side. It's the wire that isn't pink on the two wire plug hanging out of the harness along driver's side inner fender (red/yellow or green white, but it has been a while so I can't be sure except to say it it the other one that isn't the pink wire).

Go drive car and then let it run and then you attach a volt meter between 12V + and the wire and count pulses. 4 pulses is the code for knock sensor.

This terminal is meant for a diode readout but you likely don't have one lying around. A digital logic probe like radio shack sells will work fine but so will counting the ranging pulses of a voltmeter.