The dreaded P1320

[60fireflite]

Hi everyone, thanks in advance for any and all help. I have a 2000 I-30t. The SES light came on recently; after checking, I had received the dreaded P1320 and replaced all coils and spark plugs. I cleared the code, the car seems to idle fine. If I turn the car off and let it sit for several minutes, then start it up, the SES illuminates again. If I drive it around the neighborhood (no more than 45 mph), it seems to run fine. There is a slight roughness under stiff acceleration but it seems smooth otherwise. I have visually inspected all connections & do not see anything abnormal.

I'm not sure what to do next. The car is not a primary vehicle so I can take my time troubleshooting. Any suggestions would be appreciated.
Thanks!

[loystock]

Aside from harness and ignition coils, P1320 problem can be caused by faulty condenser (capacitor) or Crankshaft Position Sensor. The condenser seldom fails so it would be better to do a continuity check first on the harness before checking the condenser and the Crankshaft sensor.

There are numerous threads about P1320 problems...just do a SEARCH. For diagnostic, refer to the attached link, starting on page EC-506. It's for the 2001 I30 but should work for 2000 I30.

http://www.nicoclub.com/FSM/i30/2001/ec.pdf