Purging the cooling system is a little involved, but isn't something that you can't do.
Pick up a Haynes or Chilton manual and read the chapters about replacing the water pump and the thermostat. One or both of those chapters describe how to bleed air from the system.
Defective exhaust system.
The price for a new exhaust system for a 1995 Pontiac Sunfire is between $110 and $253, depending on the brand chosen. The MagnaFlow is one of the more expensive brands.
The cooling system diagram for a 1996 Pontiac Sunfire can be found in its manuals. It can also be obtained as a print out at an auto part store.
buy a new one
i have a 2001 pontiac sunfire antitheft problem will not start anttheft light flashs on dash i can turn motor over buy jump starter but will not start
Exhaust system. Usually manifold near port(s).
It doesn't have one unless you put one in yourself
typically about $400.00 it is a modular system rather easy to do.
My car won't. Start no power to the fuel pump because of the antitheft
it means you have your traction control turned off Enhanced Traction System
the new key has to be coded by the dealer costs 20$
A bad PCV valve or a problem in the PCV system will cause this