That's a very diffcult question to answer. The so many variables. If you do all the work yourself and know where to find the leak the cost could be minor=$5. to $50. buck. However, if you have someone else do it for you, your looking at anywhere from $250. to $1000. bucks.
Leak detection pump.
i believe the heater core is leaking, a small pin hole leak can generate a lot of smell.
Under the Air cleaner assembly on the left front of the engine compartment.
If the drain plug under the evaporator coil is plugged up it will cause condensation to leak into the car. If the heater core is bad it will allow coolant to leak into the car. If the leak is warm and smells sweet it is the heater coil.
The obvious answer would be that there would be a leak somewhere...
Check for a vacuum leak either under hood or under dash Check the operation of the vacuum operated motors under dash Check the operation of the selector switch
I would look for a Vacuum leak possibly under hood. Does your Cruise control work?
Coolant leak.
Leak detection pump.
Check for vacuum leak either under the hood or under the dash Check the operation of the vacuum actuators Check the selector switch Defrost is the default setting on this system
defrost or a/c compartment under the dash
It might be an exhaust leak
i believe the heater core is leaking, a small pin hole leak can generate a lot of smell.
Under the Air cleaner assembly on the left front of the engine compartment.
If the drain plug under the evaporator coil is plugged up it will cause condensation to leak into the car. If the heater core is bad it will allow coolant to leak into the car. If the leak is warm and smells sweet it is the heater coil.
probably a fuel leak somewhere .
Yes.