Reading My ECU codes

I have the list to tell me whats wrong. I found where the LED light is. Now I just need to know what the different blinks stand for. I have 4blinks that are held for a little while then 3 quick blinks. Then it starts over. Do the 3 quick ones mean anything? Do the four long ones count for ten? Thanks again.

Four long blinks, then three short blinks = code 43

Has anyone else had a code 43? I know it has to do with the fuel delivery system. Just curious to see what anyone did to fix it.

check your injectors, make sure they are all recieving the correct amount of voltage.

What do I use to check the voltage? Is it an ohms meter or what? Where would I connect it to check the voltage?