my car has 90k on it... and it kinda high revs sometimes when i start it, and twice when it has come down from that startup rev, it has stalled. anyone seeing this, and what should i look for to remedy? im assuming it needs a tune up.

 

With that kinda mileage on the clock it needs to be serviced. Just like the 30K and 60K mile service, all fluids replaced along with filters and a close look at belts and brakes. What does you G idle at? Should be 1200rpms cold and 600rpms warm. If it's lower warm that might be the reason it's stalling...
Gary

 

it idles right at 700 warm. but yeah ill go thru the whole thing now.

 

The stalling is due to your car needing an idle air volume relearn procedure. This is a quick fix and any nissan/infiniti dealer can do it.Also you should have them clear the ecu self learn as well while they are setting the idle.