Can you leave a diesel plugged in too long?
Can you leave a diesel plugged in too long? Registered. After three hours, it's as warm as it's ever going to get. Anything more is just wasteful. Leaving it plugged in all the time (winter, summer, or in between) won't do any harm to the engine, but it'll cost you $100 per month. Is the 7.3L Power Stroke the same as the Idi? 7.3L Power Stroke Specs & Information. The 7.3L Power Stroke diesel was developed as a the replacement for the aging 7.3L IDI. Although the engines share identical displacements, the designs are of completely different nature and it...