Erratic high idle in gear

[95SleeperAcheiva]

You guys know way too much about alternators!

The ground had a intermittent open. When I hooked up for ohm I had to flex the cable to watch it jump. So sometimes it worked fine, sometimes it didn't.

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[TGP37]

You would have to have a multiphase alternator to work that way. Our alternators are no where near that complicated in design, and I doubt there are any multiphase wired ones on the market. You wouldn't need one when you have a good positive and negative wire set going to your battery

Your HO alternator has to have twice the diodes in it because it puts out twice the power. Each diode is rated for a certain amperage. Uprating the alternator and modifying it to put out twice the power requires twice the power capability by the diodes, and the easiest way to get that is put twice the amount of diodes in it.

Ahh ha, I almost made an assumption but I stopped and thought, "Hmm, I really don't know for sure"

I have 2 dedicated 2 gauge cables to the alternator. One grounded to the Alt frame > Batt (-) and the other is the charge wire straight to the battery. It is a bit excessive but that's always better then not enough.

You guys know way too much about alternators!

The ground had a intermittent open. When I hooked up for ohm I had to flex the cable to watch it jump. So sometimes it worked fine, sometimes it didn't.

I know how those breaks are. Like a broken 1/8" Audio Cable, wiggling it. It makes the connection but when the voltage is restricted, the Amps jump up and the weak spot heats up and becomes a greater voltage restriction.

When my ride had a bad ground, sometimes just trying to start the car would trip a circuit breaker. The volts got soo low the amps were high enough to trip the circuit breaker and would need to wait several minutes before the breaker opened up again.




Anyways, glad you found it. They can be tricky to find sometimes.