electrical problem with 911 fan? power surging up and down.

[petevw]

as soon as i hit 2000rpm everthing surges from like 10.5-13.7 volts causing my entire electrical system to "fade in--> fade out". the lights dim/brighten, fuel pump surges loud/quite, etc...

have a 911 fan. maybe i hooked it up wrong? how should the voltage reg be done. car had a generator before. but, this has happened this year. last summer it was fine.

thanks,
pete