2003 Nissan Murano that stalls more frequently when it first starts up what could this be I haven't had a tune up in awhile but would like to be prepared when i take it in for service?

Frequent stalling in a 2003 Nissan Murano, especially when starting up, could be related to a few issues such as a dirty or failing mass airflow sensor, fuel delivery problems (like a clogged fuel filter), or ignition system issues (like worn spark plugs or coils). Since you haven't had a tune-up in a while, it's a good idea to ensure the spark plugs, air filter, and fuel filter are all in good condition. Additionally, check for any vacuum leaks or issues with the idle air control valve, as these can also affect engine idle. Bringing up these potential issues during your service appointment can help the mechanic diagnose the problem more efficiently.