my car died today after a short drive, it has no spark. im running gen 6 dfi with a dan white plug and play harness so i have no diagnostics to check. the wiring is okay,and i tried a known good coil , didnt work. so i started to do some checks per the manual, and i find no hi res voltage from the ecm, but has low res. i thought that dfi only uses the low side, is this correct? anybody got any ideas on whats wrong or what i could check to rule out other things than the opti? the car has sat for almost a year,can this hurt the opti?