95 four winns 5.0 efi runs good off trailer and until you shut off when warm then starts rough and after 20 min or more wont start for an hour .ran code scanner shows no stored codes , think could be injectors bleed thru but not a parts changer so i would like input on ideas for test or knowledge of same problem and a solution. i should mention that if started in a short time after stopping no problems only after setting for 10 min or more
