Alright, 1987 Civic Si. We're getting no spark on 2 and 4 (2 farthest from teh distributor I believe.) We have replaced teh distributor (used) and spark plug wires (new). 1 and 3 give spark when the key is turned (2 clostest to distributor). Along with changing the distributor we swapped the rotor caps a couple times and checked all connections for excessive corrosion. We also pulled the ECU out to check if thats good, however without another car to test that on we're not 100% sure but everything looks good there.

Any ideas?