Overcharging - High Voltage

[jgf100]

Hey All, I recently did a top end rebuild on my 302 '70 F100 after an accident, replaced front clip as well. After putting everything back together, got the engine running, but it is overcharging. At idle voltage will hover between 15 to 16 and if I open throttle jumps way high to 18. I replaced the alternator, voltage regulator and made sure the radiator support, and frame is grounded.

Where do I go from here?

Thanks!

[390FE1972]

Not sure if these have the answer you are looking for, but they have some very good info.

http://www.fordification.com/tech/charging.htm
http://oljeep.com/gw/alt/edge_Alternator_Theory.html

Regards

[davelj]

Check your grounds. Bad ground on the regulator can cause overcharging. Jumper a ground from the regulator base to the battery and see if there is any change.