What's the normal air/fuel ratio?

[javierhe]

Can someone tell me what's the usual air/fuel ratio for the voodoo? I'm trying to diagnose an engine light and would like to have more information...

In my GT, it is usually around 14.0 when idle. But in the 350, I'm seeing it around 10.0 all the time, and I'm not sure if that's normal.

Thanks.

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[K4fxd]

Do you have an E85 tune in the Shelby?

If not it should hover around 14.0 just like the GT

 

[javierhe]

Do you have an E85 tune in the Shelby?

If not it should hover around 14.0 just like the GT

Thanks @K4fxd . Yes, it was on E85 before. I flashed it back to stock tune and using 91 octane now, but somehow there must be some values still stuck as E85.

 

[SheepDog]

Thanks @K4fxd . Yes, it was on E85 before. I flashed it back to stock tune and using 91 octane now, but somehow there must be some values still stuck as E85.

Try reflashing your Gasoline tune/ OEM. Air/fuel ratio is not a function of motor type, vehicle type, but a function of fuel type. Any internal combustion engine running on gasoline should target 14.7-1 at idle, but this can change depending on altitude and ethanol content. If you are seeing 10.0 on the cluster, your tune is still trying to achieve stoich. for E85

 

[javierhe]

Thank you @SheepDog

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