Hello all i have a RS turbo mfi which has desided to have a prob it started this morning but was running little ruff then its now died all togeather and has no spark from coil when ignition is off both posative and neg on coil show negative then with ignition on there both posative ??? any ideas guessing a wire prob but is there a idea of wherte to start or some thing to test out inc places to look for a broken/short wire