Quote:
Originally Posted by Rusty
I've done this with older cars. Never with a newer one. If the voltage drops below 9.5 volts. Most ECU's will shut down.
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Yeah its one of those things we all used to do, but on modern cars with all the electronics its a really bad habit. It sends spikes through the electrical system. I know Chrysler / Jeep systems are bad examples of this, many of these will go to 20 plus volts, some just sit there at this voltage with bad batteries (or missing batteries).