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

injectors size

  • Thread starter Thread starter donfina
  • Start date Start date Dec 30, 2005
D

donfina

New Member
Dec 29, 2005
3
0
0
Dec 30, 2005
#1
  • Dec 30, 2005
  • #1
bought 93 already had 30lbs injectors (red) throttle body 65 e303 cam forged pistons edelbrock performer cold intake what maf should i have seems to be lean
 
D

donfina

New Member
Dec 29, 2005
3
0
0
Dec 30, 2005
#2
  • Dec 30, 2005
  • #2
fuel pump?

runs lean when i get on it fuel pump?
 
D

donfina

New Member
Dec 29, 2005
3
0
0
Dec 30, 2005
#3
  • Dec 30, 2005
  • #3
hello
 

RyanSG

Founding Member
Oct 24, 2002
286
0
17
Allentown, Pa
Dec 30, 2005
#4
  • Dec 30, 2005
  • #4
Can you conferm what AFR your running when it seems to be going lean?
 

srothfuss

Last night I stabbed the same guy 7 times in a row
Oct 17, 2004
1,796
3
0
Woodward Ave.
Dec 30, 2005
#5
  • Dec 30, 2005
  • #5
30# injectors are not required for a N/A application.

Have you had your Mustang hooked up to a dyno to see where you are leaning out? Do you have a wideband O2 setup? Your car being lean is a sign of something wrong.....

19# injectors are good up to 300 Horsepower
 

18mustangs

New Member
Jun 8, 2005
533
1
0
Virginia Beach, VA
Dec 31, 2005
#6
  • Dec 31, 2005
  • #6
donfina said:
runs lean when i get on it fuel pump?
Click to expand...

If it's running lean when you get on it my first reaction would be fuel pump, are you still running the stock one? BTW, for your current setup 30# injectors are a bit big, you'd probably do well with 24#.
Tim
 

QDRHRSE

New Member
Dec 31, 2002
1,590
0
0
Palmdale, CA
Dec 31, 2005
#7
  • Dec 31, 2005
  • #7
I'm with the other guys. With 30's you should be rich. It also depends on your fuel pressure. If you don't have an AFPR-get one. If you do, give yourself a little more fp. If that doesn't work try changing the fuel filter. At that point you may want to consider a pump. Also, how do you know that you are running lean?
 
You must log in or register to reply here.

Similar threads

Engine Hiccup at full throttle
  • keel
  • Jun 2, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
31
Views
760
Fox 5.0 Mustang Tech Jul 30, 2026
keel
K
Resolved Need some assistance. Holley Terminator X alongside H/C/I. Very rough/inconsistent idle
  • karhoot
  • Jun 6, 2026
  • Fox 5.0 Mustang Tech
Replies
0
Views
122
Fox 5.0 Mustang Tech Jun 6, 2026
karhoot
K
9
Engine Donor '00 Mountaineer meet '91 Fox
  • 91firecracker
  • May 11, 2026
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
41
Views
1K
Fox 5.0 Mustang Tech May 28, 2026
91firecracker
9
S
Fuel ‘88 GT Runs Rich Cold — Fixes Itself When I Unplug Sensors (ECT, MAF, O2, etc.)
  • Sufarry
  • Nov 6, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
949
Fox 5.0 Mustang Tech Nov 9, 2025
Mustang5L5
M
Engine Unexplainable Exhaust Pop and Gurgle
  • Mrnissen122
  • Feb 14, 2026
  • Fox 5.0 Mustang Tech
Replies
12
Views
657
Fox 5.0 Mustang Tech Feb 18, 2026
Noobz347
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?