Pvincil

I have a 94 z28 with about 125k miles on the engine. Its been having random issues lately. it stalled on me a few days ago while driving, then started rght back up no problem. I took it to a shop and they looked it over but saw no problems anywhere. Then today i drove it about a mile to the local fast food place, went inside got food and when i came out it wouldnt start. fuel pump buzzed when i turned it on, the started turned over but it wouldnt start. i fiddled with both fuse boxes, wiggled all the fuses and it started right back up.....i dont know if i should replace the fuses as a whole or if its a problem with the wiring or even the ground/grounds.

any advice would help. electrical issues really arent my specialty