Originally Posted by TN370ZLC

Don't really know but it sounds like
it could be a sensor ..... maybe .

I just took my 2003 Sentra into the
dealer for the same thing that you
are describing. Hard starts and finally
stalling after driving all day and
letting it set for a couple of hours.

Replaced the fuel pump ($ 680). This
did not fix the problem. After doing my
own investigating on the internet, ....
it turned out to be the Crankshaft positioning
sensor ($ 187). I took it back to the
dealer and they replaced the sensor.

Car runs fine now . It is now fixed. Starts
up on the first turn of the key.

Let us know what it is .....

Tom Geer in Tennessee

.