1381 error code and jerking

Hi,

Honda Accord 2002 SE 2 door coupe 190k miles, new transmission less than a year old

Symptoms

While driving car starts jerking violently for a few seconds then the check engine comes up. This happens sporadically but seems to happened after driving for long time at least 30 min or more.

When putting it on the computer the error code came up is p1381

I have switched distributor few times, thinking the first time it was faulty, then second and third same thing few days later after fixing it the symptoms come back and the light comes back (check engine)

Also, while sitting in idle the RPMs go down almost to car shutting down then it comes back up a little bit (not sure if it s related)

I changed spark plug and wires just to be sure (Honda parts) but that didn't help

Any ideas are welcomed.

Thanks in advance