1996 Yukon won't start in rainy/foggy weather
5.7 l engine, power brakes and steering, cruise control, air con, power windows and driver's seat. It will also quit completely, even at operating temp when driving thru wet, slushy snow. Dist cap, rotor, coil, and plug wires are all brand new. Sometimes, but not always, if I spray WD-40 over all ignition components, it will start.