Codes P1320 and P0304.

[pa2000cer]

My car runs great for about half a day when I turn it on in the morning. Then, if I turn it on before it cools all of the way down, it runs and idles horribly. I got the ses codes and they were P1320 and P0304 and I have a few questions:

1) How do I know where the 4th cylinder is on my engine?2) Where is the best place online to buy the coil pack?3) Do I need to replace my O2 sensor as well?4) Should I do a resistance test on the coil pack before I do any of this?

Any help would be greatly appreciated.

Thanks.

[NutriaforBreakfast]

http://www.nicoclub.com/FSM/maxima/1995/st.pdf

You might try to work your way back to your model and year withthis

1)Also look in your owners manual for a diagram of the enginewith the cylinder #. I know it was in mine

2) I only trust OEM coils

I will try to come back with more info on 3 & 4

[Mike G]

Numbers 3 could be a resulting condition from the failure of the coil pack.... I would iron that out first, run the car for a couple of days, clear the codes and go from there.

Just my $.02's --Mike

[pa2000cer]

Mike G, just to be clear...you would change the O2 sensor or change the ignition coil first?

[Mike G]

Mike G, just to be clear...you would change the O2 sensor or change the ignition coil first?

Ignition coil first, that would more than likely lead to a rich condirtion in your exhaust system, causing the O2 to pop...--Mike