Keyless entry 2002 PT Cruiser

I have a 2002 PT Cruiser, has keyless entry - no factory alarm.  I have added a Prostart CT-3300 remote starter with keyless support (lock / unlock).  The suggested resistor values for the lock and unlock pulses do not work properly.  The doors lock with a single neg pulse through a 250 ohm resistor, but when the double neg pulse through the 1000 ohm resistor is sent to unlock, the actuators chatter - seems that they are trying to pull into the lock position again with each pulse.

The lock pulse is 7/10 second, the unlock is a double 1/4 second pulse.

I've seen reference to using 2.7 - 3k ohm resistors to lock and 7.2 - 7.5k ohm resistors to unlock but these values seem to refer to vehicles with oem alarms.

Any suggestions?

The 3k single pulse lock, 7.2k double pulse unlock did not work either.  This time the system would not lock.  With the doors locked pressing either button unlocked the doors, the unlock (using double pulse) chattered the actuators (tried to unlock the second time)

Used 250 ohm single pulse to lock and 7.2k ohm single pulse to unlock and it works great.

Thanks for the reply, it pointed me in the right direction