1987 gxl same year tii swap. is there anything else that would cause a leading coil to not spark other than a bad igniter. have 12v constant and 0-5v signal when cranking (checked with graphing dmm). also ran a ground from L coil assy. to battery negative. getting spark on T coils. the only weird thing is that i tried 2 different coil w igniters (coils tested) and no spark on either. could the coil tester have fried the igniters? also where can i find a part number for just the igniter, want to buy one but dont need the whole assy. or coil with it. finally is there a way to test these s4 igniters? could only find test for fb or will the same test also work on fc igniter. thanks in advance.