replace the hose or gasket the is leaking, you can spray carb cleaner around the eng whil runnig to locate the leak the eng will try to stall
Sounds like a vacuum leak. Check all vacuum hoses. But before you do that change the air filter.
cracked hoses
you have a vacumn leak.
water leak or bad thermostat
vacuum leak
why is my 2006 Altima blowing cold air when not in motion , example stop light or as soon as it is idling even when it has ran for a long time and the engine is warm. The controls for the "doors"(vent covers that direct the air)are run by vacuum. There cold be a vacuum leak of one of the doors is stuck.
We are going to need to know where the source of the leak is to help you with that question.
The simple and really only answer I can give you is to find the leak and repair it.
Because there is a hole in the hose! Replace the hose
replace fuel cap with Nissan only OEM replacement.
If you have the electronic climate control system it most likely is a Vacuum Hose leak Start under the hood on Passenger side and replace all hoses from canister to under the dash this should help. With a Vacuum leak it defaults to defrost mode
Check for a vacuum leak on the intake. if there is no vacuum leak then you will need to rebuild the carburator. if your bike is injected change out the injecters