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| Gryphon Programmer Edge Product has discontinued the Edge Evolution 2, but we still provide support and tuning for it. If you have a question or comment relating the Gryphon (or Evolution) programmer, post it here. |
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#1
Sun, June 19th, 2011, 08:08 PM
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Air/Fuel Ratio Calculation?
I am curious to know what my air/fuel ratio is since I have made an intake modification. Is there a way to calculate it using the records the gryphon programmer with record or just simply any way of calculating it?
Last edited by eej711; Sun, June 19th, 2011 at 09:42 PM. 
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#2
Sun, June 19th, 2011, 08:48 PM
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It's always going to be around 14.64:1 unless you're in open loop (near WOT) or the PCM isn't able to correct anymore for a severe lean or rich condition.
__________________
Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes. SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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#4
Mon, June 20th, 2011, 08:14 AM
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If your truck is running TOO lean, your truck will set lean codes and turn on the check engine light. The PCM is able to correct up to about 40-50% plus or minus (short term and long term combined) on the injector pulse width to correct for lean and rich conditions. Once the PCM begins to correct more than 15%-18%, you will get a check engine light.
If you want to see how much your air/fuel ratio is being corrected, you'll have to look at the long-term and short-term fuel trim correction data. If the LT fuel trim is within 10% (and ST is stabilized at 0-2%), then there's nothing to worry about. Basic answer, if your check engine light isn't on and you're not experiencing surging, hesitation, detonation, etc., your A/F ratio is 14.64:1
__________________
Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes. SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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