Alternator help ?

[808Gt]

I just did my 6g alt upgrade and it is doing this weird thing were, when I start the car and let it idel it would go up to like 14.1-15.1volts? and on the gauge the needle would bounce up and down?

does anyine know what could be the problem? also one time it shot up to like 16 I think and my amp light came on dunno, I put one ground wire from behind the batt to the engine, would putting two more ground wires help it?

 

[BK_CAULEY]

no. i have seen othere cars so this before. i think it is the crappy unacurate factory gauges. but adding more grounds isnt going to help or keep the voltage from spiking if it really is, and not a gauge problem.

 

[808Gt]

I also used a meter to check the voltage from the batt. and it also is spiking also, reads 14.1-15.7 volts...?

 

[nicks95stang]

Voltage regulator maybe?!

 

[808Gt]

thats what i was thinking... dunno ill go get a new one and see...

 

[Mustang5L5]

Did you disconnect the 10G wires from both ends?? In other words, you took the two off the OEM alt, did you disconnect the other ends at the solenoid??