1994 Honda passport 3.2 motor will start and idle for a minute then the idle will drop come back up then fall off and die?

1994 Honda passport 3.2 motor will start and idle for a minute then the idle will drop come back up then fall off and die?

Replace the air filter. Clean or replace the idle air control valve. Check the fuel pressure with a gauge. Check for a timing belt/chain that has jumped.