[slace22]

First thing, i had my car put on a computer and had some things fixed but i still need a new ignition coil, fuel injector , and oxygen sensor, my question is would any of these things cause this problem i am having.
The problem... When the car reaches a certain temp. it shuts off , it is not over heating.
On a cold day the car will run forever because the temp gauge doesnt reach that certain temp, on a hot day it will rise faster and shut off , and like i said the car itself is not overheating when it shuts off but it seems to think it is.
Every time the temp gauge gets to the 1/4 mark it shuts down.
Could the ignition coil or oxygen sensor really be causing this problem?
Like i said i had it on a computer and those are the problems that came up.
Thanks for any help.
HR