• Mustang Forums
  • 2005 - 2014 S-197 Mustang -General/Talk-
  • 2005 - 2009 Specific Tech

Tunes and emissions testing

  • Thread starter Thread starter jpplaw
  • Start date Start date Sep 10, 2010

jpplaw

Member
Jan 14, 2009
185
3
18
Sep 10, 2010
#1
  • Sep 10, 2010
  • #1
A Question for the Tuners out there:
I know this has been beat to death before but I can't seem to find the answer I am looking for...does anyone know what parameters that can be changed in a sct tune that will keep the readiness monitors from going ready? I mean other than turning the rear O2's off, that one is obvious.

With my emissions tune, "evap" has gone ready but O2, heated O2 and Cat will not go ready, even though I've driven hundreds of miles. No codes showing on my OBD2 scanner.

I am told the rear O2's are turned on. H-pipe and cats are stock.
 

SpartaPerformance

10 Year Member
Nov 5, 2006
2,517
61
89
Long Island NY
Sep 10, 2010
#2
  • Sep 10, 2010
  • #2
To "ready" the monitors the vehicle must be driven at threee speed levels, 0-20, 20-40, and 40-up. About 30 miles or so. If they're not going ready then they must be turned off. Either way you can not turn them on or off through the handheld.
 

jpplaw

Member
Jan 14, 2009
185
3
18
Sep 11, 2010
#3
  • Sep 11, 2010
  • #3
Thanks, Sparta. I know the handheld won't do anything in regard to the monitors.

My tuner (see my sig) keeps telling me that the rear O2's are turned on in the tune and "thats all we can do for emissions". I am not so sure that is an accurate statement, because it isn't working.

Looking at other forums, there seems to be some other settings that affect the montors besides the rear O2's. But nobody ever says what they are.

I've driven hundreds of miles, all speed ranges, and the only emissions monitor that will go ready is "evap". This is puzzling me, because all my research shows that "evap" is the hardest one to get to go ready.

There must be some people on this forum that do actual tuning, for instance by using SCT's "Pro Racer" or "Advantage" software, that know what else affects the monitors.

Anybody?
 
You must log in or register to reply here.

Similar threads

Tuners come on inside
  • squeak93
  • Feb 13, 2026
  • SVT Tech Forum
Replies
1
Views
223
SVT Tech Forum Feb 20, 2026
squeak93
B
Saying Hi
  • BriansNSane
  • Dec 20, 2025
  • The Welcome Wagon
Replies
5
Views
273
The Welcome Wagon Dec 21, 2025
BriansNSane
B
E
Nightmare after tune install!
  • EnemyofTyranny
  • Mar 29, 2025
  • 2005 - 2014 S-197 Mustang -General/Talk-
Replies
1
Views
408
2005 - 2014 S-197 Mustang -General/Talk- Apr 12, 2025
89ripper
L
Cannot get P1000 code to turn *on*
  • LimeyC
  • Apr 15, 2024
  • 2005 - 2009 Specific Tech
Replies
1
Views
724
2005 - 2009 Specific Tech Apr 15, 2024
Bullitt347
N
help, o2 and cat monitors wont ready for emissions test, 2013 mustang gt
  • nmontalbano
  • Nov 27, 2023
  • 2010 - 2014 Specific Tech
Replies
5
Views
1K
2010 - 2014 Specific Tech Nov 27, 2023
nmontalbano
N
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 2005 - 2014 S-197 Mustang -General/Talk-
  • 2005 - 2009 Specific 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?