Alternator voltage too high.

[Jasong]

I recently swapped in an SR20det into my 91 240sx and the alternator was putting out too much voltage. It was around 16.4 volts. I swapped the ka24dohc off the motor that came out of the car and its even putting out more voltage than the other one, around 18 volts. The one I put in, I took to auto zone and had it tested before installing it and it tested fine. Does anyone have any ideas. Thanks.

[Beancooker]

The use of a voltage regulator could help your problem. I'm not really good with underhood electrical, but I think that is the solution you need.

[Jasong]

Both alternators have regulators built ino them.

[evildky]

did autozone test the regulator function as well? they have seperate tests they run, and this might sound stupid and I can't really explain it but do you have an aftermarket steering wheel? if so try unplugging the horn, that one still baffels me but worked on a coule different cars, kinda bugs me taht it worked honestly

[180fan]

your alternator's got the regulators built in. if it's at 18v, it's defective. go back and have them check it over.

[Jasong]

Aotozone checked three different things on it though I don't know what each one was. I don't have an aftermarket steering wheel. I will take it off and this time take it to an alternator place to have it tested. Thanks everyone for your input.