Very often the voltage at the gauge is NOT the voltage at the battery where the alternator is hooked to. So the gauge is down stream, and measuring voltage at the cluster and this voltage is usually lower due to small wires and bulbs and other loads on it. Some times even have a foil circuit board on the back of the cluster that can have coorsion on it and on its connections. Cleaning all the connections will usually fix the problem. Remember the alternator has a voltage sense lead and it bring that point up to 14.2... turning an the headlights, heater, a/c could in fact bring other parts the wiring system down in voltage pending again on wire size, relay contacts and other factors. Dodge pickups have problems with a ground under the battery tray cause the over drive to hunt due to a .5 volt drop.. .enough to screw up the computer control.
But.. if it aint affecting the driving part, it probably aint worth chasing.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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