If your voltage is normal at idle and shoots up as you increase RPM, then I'd say your voltage regulator is bad. In older cars, it is a separate part, but most cars, it is built in to the alternator. It is more cost effective to replace the whole unit. You can have it pulled off and tested at your local auto parts store.
11-15v from batt.
Spark plugs don't produce high voltage they just make sparks with high voltage. The high voltage in a car is produced by running the low voltage of a car through a coil and condenser a distributor defines exactly when the spark happens to light up the fuel in the cylinder
put the thing on the end of the thing
By an old shack marked ''Danger High Voltage!''
The coil generates the high voltage charge which is then distributed to the spark plugs by the rotor arm in the distributor cap.
sounds like you have dirty field points on your alternator or your voltage regulator is going bad. Replace your voltage regulator in your car first, they usually only cost like $20-50. If it doesn't fix the problem take it back. Then have your alternator checked out by a store that only does alternators... This is provided you haven't changed any idle pulley sizes, if you have your under the RPM's required for that alternator.
18 to 20 gauge high strength steel on modern cars and 16 gauge on older cars.
15.5 volts
The coil is a high voltage transformer, used to step up battery voltage to 50,000 volts to fire the spark plugs.
Two options. Either the alternator is bad (voltage reg), or the computer is no good. Turn the head lights on (at night). If thy flicker, like high beams, then the computer is fried. C.E.
Vehicles do not come with a digital car gauge. You have the option to install a gauge in your car at the time purchase.
GAUGE IN DASH OR ITS VOLTAGE REGULATOR IS BAD. WIRING OR CIRCUIT BOARD. UNIT IN TANK. FLOAT IN TANK HAS SUNK. dISCONNECT GAUGE AT TANK AND GROUND THE WIRE-THAT SHOULD CAUSE GAUGE TO GO TO FULL HOT. MOST CAR GAUGES WORK THE SAME WAY.