Fuse blowing for ECU

[RickPass]

About 3 times now the fuse behind the battery in the fuse box keeps blowing. Its a 25amp fuse. The box diagram says Engine Cont. Which I took as the ECU. If the fuse keeps blowing would that mean time to change the Unit?? When that fuse blows I get no spark at all to the Dist. or coil. Does anyone have an idea? I am disabled and this car is my lifeline. Thanks, RickStupid me, its a 1993 240SX . Automatic. Something came up this morning. I fixed the Fuse and when I turned off my key there was a buzzing noise from the motor. There are 3 sensors or plugs above the Alt. on the head. One of those were buzzing and after I moved it around it quit. I went in and the car started up. When your standing in front of the car looking at the motor you can see these plugs or sensors going into the motor. Right down below from the first injector . Anyone know what they are, and what they do.
Modified by RickPass at 12:29 PM 5/10/2008

[vancouverbc]

it goes to the eccs relay. lots of places for the short to be in that circuit. not sure what would be common places for a short http://img522.imageshack.us/my...5.jpg


Modified by vancouverbc at 3:16 PM 5/9/2008