If new caps don't fix it you should get in contact with an ECU guy to see if you can get it fixed. The ECU in my car now came to me with a fresh rebuild by keydiver and it had experienced so much cap leakage that he had to patch surface elements to a board with bits of fine wire to repair it.

Try to clean the acid off if you do recap it... I once knew what you are supposed to use to clean it off but now I've forgotten. If I find the information I'll let you know, it's some sort of electronics cleaning solution.