[SalmonPatty]

Hello all! New to the mustang community as of December last year with a 2014 gt. I love it and have been steadily modding it and recently put a deluxe gauge cluster with Track Apps. I have been checking out my AFR during pulls and I'm getting a little concerned after comparing to others numbers on these forums. During WOT my AFR does not drop below 14 but also idles around 14.3. As far as I know it's not been tuned but there is a CAI and a modified exhaust so I'm guessing it could be. I have a forscan tool from swapping the cluster that I could check for a tune with when I'm home from work but hoping to get some insight from the community. Any help would be appreciated.

 

[crjackson]

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14.2 is fine on the 2014 Coyote. Mine runs the same at idle, and has since new.

 

[SalmonPatty]

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14.2 is fine on the 2014 Coyote. Mine runs the same at idle, and has since new.

Yeah I've seen a few people with similar idle numbers, it's the WOT I'm worried about. 14.1 while my foot is to the floor seems very lean to me. Unless that's what's you were specifying was okay on these models.

 

[crjackson]

I can’t really help there. Mine is heavily modified, and I doubt we’d have the same numbers at wot. Also, I can’t really go wot on the street, I don’t have a place to test at the moment. @5LHO can probably shed some light on this.

 

[SalmonPatty]

No worries, you're probably right. Got forscan set up to log rpm and afr lambda so I will upload those when I get the chance. Never noticed anything out of the ordinary when monitoring temps after a pull so it can't be the worst thing in the world.

 

[5LHO]

The engine is ALWAYS trying to be around stoich, which is 14-ish:1 in every condition bar full throttle application. If the car is making good power at wide open with no codes, I'd suggest it's a display issue, rather than a real one. If you were at 14:1 at WOT, the engine would be freaking out, way down on power and throwing lean codes. I suggest getting a cheap plug-in style monitor for the OBD2 port (anyone with a tuner like the SCT can do this, too). I have a Dashhawk I've had for a century. That is telling you what the ECM sees, not what the Instrument cluster indicates.