Fuel pressure question??

[coobie]

I have the Fass system installed with a autometer fuel pressure gauge (15psi). The needle always stays pegged at 15psi in the warmer months. The temps have turned cold here in Michigan about 9 degrees at night. My question is the fuel pressure gauge reads about 12-13 psi under light throttle. Is this normal because the fuel is thicker with the cold weather?I have around 7000-8000 miles on the the fass filters and truck runs great. Thanks for any info,coobie

 

[steved]

I'd say your filters might be due for a change... I just installed mine and the colder it gets, the more pressure I have...



steved

 

[JVolpe]

I agree, maybe filters. I have a 0-30psi fuel pressure gauge. 18psi idle always until it got below 40*. Until everything warms up I see 18-25psi. After everything warms up it is back to normal 18psi idle and 15-17psi cruising.