I need some help with my alt hook up, as I'm not so smart when it comes to wiring....
I finally got my car up and started, but have a issue with the charging. I'm using a after market ecu with a laptop to show me the vitals while I have it idle in the driveway for now.
My laptop shows the alt is putting out 13.5 - 14v but soon as my electric fan kicks on (thermostat switch turns it on @ 190deg) the charging system goes bananas... it jumps to 17 - 18v which throws my standalone ignition into a frenzy and makes it run like crap.
What would cause the alt to spike up the charging volts like that? I must admit, I hooked the RB alt up to the Z wire harness very simple. I just hooked up the charge wire in the Z harness (the wire that was hooked to the Z alt + post) to the + post on the RB alt, then ran that to the + on the starter, then to the + post on the battery.
I did not use any of the old external voltage regulator wires, and did not use the T connector (sensing and lamp I think).
Basically, I think I have the RB alt hooked up like this: the heavy gauge wire in the Z car harness that goes to the power post on the Z alternator, is hooked to the power post on the RB alt, then I ran a heavy wire from there, off the alt to the starter, then from there to the positive on the battery. It works cause my laptop shows it charging at 13.5+ volts while running in the driveway.
The problem I have is the spike when the fan comes on.
What do ya think guys? Did I goof up the hook up of the RB alt? if so, how do I fix it?
thanks in advance - joel