Jumping a car makes the voltage going to the electrical system fluctuate widely. For instance, you have a 12 volt system. The 12 volt system may be rated to safely fluctuate between 8 volts and 14 volts without a problem. However, if you jump start the car, the voltage may spike up to 16 or 17 volts. This would then fry the computer. This is the same kind of situation you would have at your home if the had a lightining strike, and the power in your house spiked, and it fried your computer, TV set, home entertainment system, stereo, etc.
If that happened, and you fried the car's computer, it would send a trouble code to the check engine light. The trouble code would be one indicating that the computer is malfunctioning.
To start a car with a dead battery today. You would use one of those portable charging devices you see around. That they sell in the stores for about $60. If you were to call for road service from someone like AAA, that is what they would use to start your car - they would not jump start.
This doesn't just apply to Milly's. It applies to all newer cars with computers. Older cars (say from the 1960's) didn't have computers or fancy electrical systems. So the spiking effect of jump starting didn't hurt them. Because there was nothing to damage from the spike.
The reason it is even more relevant for a Milly, is because Milly parts cost 3 times more than any other car. So, I would assume that the computer for a Milly cost much more than any other car.
Also, the portable charging devices are much safer for the people involved in the process of getting the car started. Jump starting is more dangerous, because the spiking could cause the battery to explode in rare cases.
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