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

Help with fuel psi problem

  • Thread starter Thread starter alanw6
  • Start date Start date Jun 25, 2004

alanw6

Member
Dec 19, 2002
449
0
16
memphis, TN
Jun 25, 2004
#1
  • Jun 25, 2004
  • #1
Hello,

I just added some new mods and am having some problems with my car not running well at all.

I just added an aeromotive AFPR and walbro 255 in-tank pump. My fuel pressure was set to 38 lbs. and it seems my car is running extremely rich. It was set with vacuum off.

My car is a 92 5.0 with stock motor, vortech s-trim, msd 6al, t-rex, afpr, 255 in-tank, and full exhaust. All other components are stock, including the 19 lb injectors.

Under WOT, I'm seeing my fuel psi gauge spike to almost 100 psi. Before the afpr and pump, it would go to around 80 under WOT. The blower kit includes a 12:1 FMU.

Anyone know what I could try? I'm open to suggestions and appreciate any help. If you need more info, let me know.

Thanks,

Alan
 
You must log in or register to reply here.

Similar threads

S
thread no longer needed
  • skidad
  • Oct 17, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
123
1996 - 2004 SN95 Mustang -General/Talk- Oct 17, 2026
skidad
S
M
01 mustang 3.8 fuel pressure issue
  • Mhaley2006
  • May 29, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
4
Views
502
1996 - 2004 SN95 Mustang -General/Talk- Aug 9, 2026
JohnKay
J
Electrical problem plug in the drivers kick panel
  • Mindseye007
  • Aug 16, 2026
  • Fox 5.0 Mustang Tech
Replies
3
Views
220
Fox 5.0 Mustang Tech Aug 16, 2026
Mindseye007
C
98 gt fuel pressure issues
  • chasecollier1984
  • Jun 2, 2026
  • SN95 4.6L Mustang Tech
Replies
0
Views
172
SN95 4.6L Mustang Tech Jun 2, 2026
chasecollier1984
C
Fox Fuel Pump Issues After Replacement/Upgrade
  • Ryu
  • Jun 23, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
24
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 13, 2026
Ryu
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?