BEEN HAVING THIS PROBLEM ALL WINTER. GETING NO CODES BUT AFTER STARTING CAR WITH FOOT ON GAS PEDAL ITS WILL IDLE ABOUT 1000 RPM BUT IF I DONT START BY TURNING THE KEY. WHAT SENSOR OR ITEM IS BAD OR COULD BE GOING BAD?

engine coolant tempature sensor

Clean your TB/IACV.

Your car dose not like that you type in all caps

sorrry about caps

where is the iavc? tb has been clean , doesnt coolant temp throw a code when not working properly

IACV is to the right of the TB. Look at the stickies it's in there somewhere.

iacv is the valve directly behind the throttle body, it has a brown, purple and pink connector, along with a intake hose running from it to the intake box.

no not always had one go out on me this summer my cooling fans were workin sparadictly i change the ects and fixed my problem didnt throw a code not sayin its your problem just giving some advise deff clean iavc it located to the right of the tb has different color plugs on it

I'm having this same problem. I wanna get it fixed before I go to the local northwest nissan's show next month, so I guess I'll be trying these things.
Can anyone tell me specifically why the temp sensor would cause this?

Replace Fuel Filter

check the sig. Keep your MAF clean.