Hello all, i'm new to this site and hope someone here could shed some light on the problem i've got.

I have a 95 wrx with an ignition spark problem its only sparking on two coils. I have checked all the coils and they are all working fine. I have then checked the power feed to each of them and thats fine to.
Began checking the wiring harness back to the ecu and have found that the four coil igintion wires are all linked to three wires running into the ecu (i know this is long winded).
Now i thought that there should be 4 independent wires for each coil that go into the ecu. Don't know whether some wires have shorted out anywhere.

Ran a diagnostic test and fond the water temperature sender was broke so i fixed that yet the problem is still there.

Sorry for the long post but if anyone could shed some light on the subject i will be very greatful.

Also if anyone has a wiring diagram for the 95 wrx or similar i would appreciate a copy.

Thanks all Surefire

 

some drawings that may be of help

 

Thanks mate,
hoping its what i need, and that it should explain whats going on so i can get it running again