While driving full speed (55 mph), car shuts off. First RPMS drop to 1 - 1.5 (like being in neutral) then car shuts off – no sputter or cough, no rattle or puff of smoke, just kaput! If I try to restart immediatelly (after coasting to side of road) it turns over but won’t start. Wait 60 seconds and it starts and drives normally. Have had it looked at, checked distributor cap, plugs, ignition coil and applied dielectric grease in case moisture was wreaking havoc in that area, but cannot find source of problem. Probably coincidental but it may happen more often in hot, humid weather?
Can anybody help? Thanks!