Ihave a eletcric fan holley fuel pump and eletric water pump , My battery is a optima red top and my alt also tested good awell ( took battery and alt to advance to get them tested .. When i go to start my car my volt meter got from 12v down to 9v but then fires and wont go past 12v at idel or when a raise the rpm's to 2500 rpm's . I charge my battery up and let it sit then go back and check it with a multi meter and I can actualy watch it drop voltage as it sits un hooked in the car . so I figure my battery is bad all new cable and everything my alt is a gm 1 wire on 65- 70 amp , I gona up grade it to a 95 amp becuase of all the draw my fan , water pump , & fuel pum draw, Is it possible my battery is shot even though they test it and it comes back ok ????

I alos have under drives pulley on the crank and stock pulley on my alt I was gona try to get a sock pulley for the crank since I got the car with the underdrive pulley and I dont belive the help a hole lot
for street aplication .

I hope someone can help me and thanks in advance

 

HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

your guage on the dashcould be bad,

does it drive allright?

 

I have a autometer and it reads the same as th one in the dash and they also read the same thing that my multi meter says

 

well I got a new red top today and unpuged my eletric fan whichg is on all the time . my car went to 14.5v at idle so I just used a toggle switch that was on my console but wetn to nothing so I switch it on and off when I need . the swtich will work till my 108amp alt comes on monday Ill probally set up teh fan to be tempeture controled soon

 

sounds like you got things taken care of then

 

yeah but my mini high tourqe starter craped out on me so I gotta pull out my p/s header and pull it out and geta ford racin starter

 

sounds fun [8D]