HELP BOLT DROPPED IN THE INTAKE MAINFOLD AND DON'T KNOW HOW TO GET IT OUT, peugeot 306 1.4 1999?

lucky me, I was changing the stepper motor(iac) on my peugeot, an easy job :), but the new bolts seemed slightly bigger than the original ones so i was checking if it fits, while i was doing that i dropped it inside the mainfold, STUPID ME i installed the new IAC and started the engine, then i think the bolt was sucked from the mainfold somewhere, i tried to find it with some magnets but no luck, what should i do if i start the car it works a while than it rattles and stoppes. should i remove the air mainfold ? please help me . cheers