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Adaptive Fuel

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Old Jan 7, 2026 | 11:40 AM
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MXram
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Default Adaptive Fuel

Hey folks!

I want to know if you have recommendations for me. I've got a condition where adaptive fuel is -95.1 and AIS (IAC) motor position is 32-33. I've replaced a lot of sensors with Mopar sensors and still the PCM is trying to compensate for too much fuel somewhere. I reset the adaptive fuel (back to 0) and it smells rich then compensates and no longer smells rich. The problem is I get pinging because the PCM tries to close the IAC to keep RPMs down which starves the engine of air.

So I wonder if fuel injectors can be a culprit? Fuel pressure last I checked was at 50 psi. It's a 5.9 Magnum.

Thanks.
 
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Old Jan 7, 2026 | 11:50 AM
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How fast does pressure bleed down after you turn off the motor? Might be leaking fuel injector(s). Might be a bad O2 sensor as well.
 
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Old Jan 7, 2026 | 12:05 PM
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Thanks for the quick reply! I need to check fuel pressure then get back to you. O2 sensor is new NTK
 
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