My car has been idling really rough at stop and kinda jumps in rpms from 700-500.
pulling 4 codes and was just wondering what i should replace first.
P1320 Ign system primary
p0325 Knock sensor 1 circuit/ bank 1
p0140 oxygen sensor Circuit No activity detected
Bank 1 sensor 2
p0325 Knock sensor 1
Circuit (bank 1)
pending
Car wasnt idling rought until i changed sparkplugs for regular maintenance.
Used new Ngk Laser dbl Plat 2647

 

i think you have a vacuum leak

 

I think he should check and make sure ALL o2s are connected... aside from that id say vac leak also....

 

 

Check your spark plugs and coil packs since the rough idle started affer that work.

 

didnt verify gap on plugs. was thinking about swapping the coils out as my first resort but i guess a vacuume leak may be the culprit?

 

http://www.youtube.com/watch?v=m07e_...eature=related

this isnt my video but is exactly what my vehicle is doing. Skip to 58 seconds if you dont feel like waiting for the first minute of his talking

 

did you read the comments coils fixed his problem get oem nissan coils no ebay sh%$ 600 dollars for all six maybe get a deal through courtesynissan.com
make sure to mention you are from the org

 

he didnt say coils fixed his problems. He said to check the coils and plugs because it started after I removed the coils and replaced the plugs.

 

 

^^^^
This is the reason for your rough idle. The primary means the error is on the ecu or low voltage side of the coil. Check the connections to the coils, make sure you didn't accidentally bend a prong when you plugged them back in. Also make sure the electrical connectors are all seated nice and tight. They have to snap in place.
^^^^
These errors have no effect on engine idle. The KS if it's indeed bad will pull timing back under hard acceleration to avoid engine knock. The O2 sensor in question is only monitoring catylist efficiency. It is not effecting engine performance.

Fix the misfire (p1320) first. Clear the error codes and recheck about a week later to see what pops up. If the KS or O2 codes come back, replace both sensors.