• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-

2002 gt - running rich

  • Thread starter Thread starter theelectricwaffle
  • Start date Start date Sep 21, 2018
  • Tags Tags
    air fuel egine mustang mustang gt new edge new edge mustang
T

theelectricwaffle

New Member
Sep 21, 2018
1
0
1
North Carolina
Sep 21, 2018
#1
  • Sep 21, 2018
  • #1
Hey guys so i have a 2002 mustang gt i picked up recently with no cats, long tube headers, no o2 sensors, flowmaster 10’s, a jlt cai, 70mm throttle intake, smaller cams, larger injectors and has 70k miles. You can definitely smell the gas when it is cranked, and im not sure what the easiest way to find out how to see if it was tuned to run rich. Could getting a 78mm throttle intake help with getting more air in? I want to leave the cams alone, but dont mind downgrading to smaller injectors. Also, is it not good to run the engine rich as it is? One final question, would it be better in terms of cost to try the throttle intake or focus on engine afr tuning?
 
M

MPN737

New Member
Aug 11, 2020
6
1
1
Kansas City, MO
Aug 15, 2020
#2
  • Aug 15, 2020
  • #2
I have a similarish setup in a 02 GT and I have a Diablo custom tune. I have been using the “race” tune for about 4 years (they give you 3 tunes) and it runs pretty rich accompanied with plenty of fuel smell. I’m not an engineer but she runs pretty strong and at 122000 and still shredding clutches. You must have a tune current on the car or I doubt if it would run with your upgrades. It may be an aggressive tune, I’m would look into a less aggressive tune if the fuel smell is unacceptable.
The only negative I understand to an excessive rich condition, besides fouling plugs, is that the excess fuel washes lube out of cylinders.... ??
 
9

92j3ieje8

Member
Mar 17, 2020
48
2
8
San Antonio
Aug 19, 2020
#3
  • Aug 19, 2020
  • #3
You probably need to replace the Canister Vent Valve Solenoid .
 

KRUISR

10 Year Member
Apr 16, 2015
1,801
903
143
Aug 19, 2020
#4
  • Aug 19, 2020
  • #4
Do you have a tune or is it running off the stock computer? I would think any computer or tune would need the O2 sensors for it to run right. Not having them would easily explain running rich.
 
S

Shuttleman83

Active Member
Jun 30, 2019
239
13
28
USA
Aug 26, 2020
#5
  • Aug 26, 2020
  • #5
^ o2's and also just being catless will do this, also a purge valve / solenoid stuck will, or a clogged charcoal canister.
 
You must log in or register to reply here.

Similar threads

2
Running very very rich
  • 2esoteric
  • Oct 31, 2025
  • Fox 5.0 Mustang Tech
Replies
4
Views
311
Fox 5.0 Mustang Tech Oct 31, 2025
Noobz347
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
737
Fox 5.0 Mustang Tech Nov 9, 2025
Mustang5L5
S
Fox '87 GT can't get to stay running
  • spilly
  • Mar 29, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
27
Views
605
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Yesterday at 9:59 AM
spilly
S
K
Engine 2000 Mustang GT - Fuel issue post-blown spark plug repair
  • kenster1092
  • Feb 26, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
290
SN95 4.6L Mustang Tech Mar 10, 2026
kenster1092
K
Y
Cams in Ca?
  • yelol2v
  • May 12, 2024
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
624
1996 - 2004 SN95 Mustang -General/Talk- Sep 1, 2024
2vVert
2
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
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?