Low fuel pressure

cumminstrokethi

cumminstrokethi

just an on-looker
Joined
Jun 27, 2007
Messages
692
Well I have low fuel pressure i've been told. With a fass 95, with the filters, it will only hold 9lbs of fuel pressure and 8lbs when it's cold outside (like now). Shouldn't I be seeing more fuel pressure than this? BTW I just changed the filters on the fass at the end of august, and it was 10lbs then, but is down to 9lbs now.

Any help will be appriciated. :redx:

Thanks
 
That seems extremely low. My fass (although it is a 150) idles around 18. I can pull it down to around 10, but that is a full blown, everything on kill run.

Do you have stock lines?

Have you upgraded to the Draw Straw?
 
friend of mine had same problem. took out a regulator spring in the fass pump and just stretched it a little (i think it was like a 1/4"). this raised his fp to like 18psi if i remember right. he also called fass and they sent him another spring that was a little stiffer but he has yet to put it in cuz he hasn't needed it.. hope this helps you out.
 
I have a 95/150 and I have 18 all day long. Have you checked the gauge, it could be dying.
 
MD-LUCKY said:
That seems extremely low. My fass (although it is a 150) idles around 18. I can pull it down to around 10, but that is a full blown, everything on kill run.

Do you have stock lines?

Have you upgraded to the Draw Straw?
Click to expand...

All the mods i have are listed in my sig. Oh,and I got in my truck this morning and the fuel pressure was at 7 which is a new low.
 
ok apparently he isn't gonna answer his phone tonight... but i serached it on google and a thread came up on TDR but i am not a member there so i couldn't view it. but look that up.. it sounds like there are a couple plugs on the pump that you can take out.. the spring will be under one of these two plugs..not sure which
 
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