Question

2000 Nissan Sentra 1.8L, how do I know which cylinder is miss fire on code p1320?

Answer 1

If you don't have any other codes combined with the P1320, the only way is by using an oscilloscope to check the signal to the ignition coils. You could also try replacing one coil at a time. You could replace coil #1 and if the code comes back then you switch back the coil #1 and install the new coil on the #2 cylinder and so forth.

P1320 NISSAN - Ignition Signal
Read more: https://www.autocodes.com/p1320_nissan.html