My Saturn 1.92001 sl1 has no spark # 1/4 coil I have changed module, I have changed PCM had to do relearn procedure to get security to reset car starts and still has no spark at coil towers 1/4 I have 5 volts to brown white wire at controll module and car runs on two cylinders that have spark??? Any ideas? I'm working with about one hair I haven't pulled out yet