Nissan: altima low idle when warm

I have a 95 nissan altima and when it gets warm it has trouble keeping the
idle up. I can't find any info in the Chilton manual on the location of the
various temperature sensors etc. Is there a good reference that shows where
the sensors are and what each one does or what to expect when one goes out?
FYI the car runs fine when started cold but if I start it when it's warm
(usually after
driving it for a while and then letting it sit for 30 minutes) it
'floods' and dies. Sometimes it will also idle fast (1500rpm) for a while
and then die in these
situations. I'm not positive that it's a sensor, but it seems to only occur
when the car is warm and has been sitting for awhile.
Thanks for any help.

--
jk