• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

fuel pressure

  • Thread starter Thread starter jaidedeye
  • Start date Start date Oct 11, 2004

jaidedeye

Member
Apr 4, 2004
627
0
16
Goldsboro nc
Oct 11, 2004
#1
  • Oct 11, 2004
  • #1
what should set my fuel pressure at? here are my mods...right now with vaccum on it sits a 30 psi idle and 35 WOT, smells like my car is running pig rich....

1990 25th anniversary LX red with black interior(original interior...not swapped!!)
306 sportsman block, stock intake manifold,1inch trick flow spacer..lightly ported gt-40 iron heads,
f303 cam, comp billett 1.7 rollers rockers
all forged scat crank, eagle rods and trw pistons
mac cai, mac 74mm mafs, 24# injectors, 65mm TB
walboro 255 gph fuel pump, underdrive pulleys
mac shorty headers, mac off road h-pipe , 40 series flowmasters.
rebuilt AOD with 2800 stall, 3:73 gears
 
D

dude5l

Founding Member
Dec 24, 2001
201
0
0
Grande Prairie, Alberta , Canada
Oct 11, 2004
#2
  • Oct 11, 2004
  • #2
Set it at about 35-40 with the vacuum line off.
 

saniutza

New Member
Oct 28, 2003
147
0
0
born in Transylvania, Romania...live in Lusby,MD
Oct 11, 2004
#3
  • Oct 11, 2004
  • #3
jaidedeye said:
what should set my fuel pressure at? here are my mods...right now with vaccum on it sits a 30 psi idle and 35 WOT, smells like my car is running pig rich....

1990 25th anniversary LX red with black interior(original interior...not swapped!!)
306 sportsman block, stock intake manifold,1inch trick flow spacer..lightly ported gt-40 iron heads,
f303 cam, comp billett 1.7 rollers rockers
all forged scat crank, eagle rods and trw pistons
mac cai, mac 74mm mafs, 24# injectors, 65mm TB
walboro 255 gph fuel pump, underdrive pulleys
mac shorty headers, mac off road h-pipe , 40 series flowmasters.
rebuilt AOD with 2800 stall, 3:73 gears
Click to expand...


"right now with vaccum on it sits a 30 psi idle and 35 WOT, smells like my car is running pig rich...." i got my pressure around 35 idle and 40 WOT .. i got a S-Trim and 42# but from what poeople told me i get a puff of smoke when i get on it or shift... i guess too rich... one could be stock computer or i got C&L mass air which it's junk(should of went with Pro M)... what kind of mass air do you have? but yeah fuel pressure 35-40 .. do it while the car is idling and disconnect the vacume hose while you do it....
 

jaidedeye

Member
Apr 4, 2004
627
0
16
Goldsboro nc
Oct 11, 2004
#4
  • Oct 11, 2004
  • #4
my fuel pressure WAS set a 40 with vac off....i kicked it down to 35 with vac off...cleared the computer disconnected the iac and reset the idle to 900 rpm (F-303 cam).....thinking my richness issues are 0-2 sensors and the coolant sensors....
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
6
99
Arkansas
Oct 11, 2004
#5
  • Oct 11, 2004
  • #5
Set your FP at 39-42psi...it should run better...no matter what it smells like...
 
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