How do I tell if my alternator or voltage regulator is going bad. When running I only see 12.8 volts at the battery. When off it's 12.1 to 12.3 volts. Is there some ohm reading I should take?
Are these part or the thermostat ignition fast idle? There not on my vacuum diagram. If they are it's just switching from port to manifold vacuum right? There are 2 of them. 1 has 3 ports the other has 2.
