my '93 350 5.7tbi 2wd is having starting issues when the weather drops less then-10celsius.if i dont run it over night then when i get up in the morning its rough and then if i shut it off for couple hours it will run fine but if it more then a few hours its rough, i have to try like 3 or 4 tries thenm it will start but real roughwanting to stall , but if i rev it up it will run but it wants to stall kinda chugs then it dies i retry and it will but have to give it some gas to keep it runningit runs like that for bout 10 min or less. till it gets warm.. block heater doesnt work that is on my to do list, get regular oil changes bout evert 6 months
thermostat or some other valves ???