Cervan,

Yes, gasoline spark ignitions uses milliamps to run the car: Thousands of them.

There may only be milliamps at the spark plugs but there a few amps going into the coil. That's why the battery goes dead if U leave the ignition switch on. This may not be true of electronic igition systems but it was on the old point ignition systems. U could actgually see the ammeter move when the ignition switch was turned on if the points were closed.

P E H