My fuel pressure is normally 60-70psi but now its at 80...any idea why?

 

Check for a vacuum leak to the hose going to your regulator if you have a return style system. If it is returnless, you may have an obstruction in the line up at the injector side or a problem with the bypass in the tank.

 

Thanks for the information. I will check for a vacuum leak and see if there is an obstruction to the best I can.

 

Well its running fine but I just don't think it should be at 80psi...

 

i'm not familiar w/ the 4.6's but 5.0's run at 36

are you sure the guage is working ? tap it lightly, mine barely spikes to 80 when i'm on 100 jets

 

yea, that sounds way too high. i run 42# injectors with a 255 lph pump on my 99 gt. mine never goes above 60