I had this problem with my 97'. You should check the oil make sure it hasn't turned to what looks like chocolate milk yet, if it has you might as well start looking for a new car. Replace the thermostat they are not expensive. If these things fail it could also be your head gasket or the head. If it is the head you are looking at $2,000 for repair. but if it is just the head, you might have a chance like I did. Luckily mine was a pinched line. Also check your lines. But a over heating problem is also hard to find.
Yes!
Something...
under the dash
usually on the driver side door
On a 98 Pontiac Sunfire, the red color of wire goes on the terminal marked "B" on the starter. This terminal is located close to the battery of the vehicle.
the 98 sunfire haz a 57.2 litre gas tank
150psi
I have a 98 sunfire with the 2.4L and it is getting about 35m/gal on the hwy.
Have a look at this web site; http://consumerguideauto.howstuffworks.com/1995-to-2005-pontiac-sunfire-6.htm FriPilot
This should help you out; http://consumerguideauto.howstuffworks.com/1995-to-2005-pontiac-sunfire-6.htm FriPilot
if you're going through the trouble of dropping the fuel tank, I'd just put a new one in and be done with it
it's getting too cool, really