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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 07-14-2013, 10:58 PM
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ericlee9386 ericlee9386 is offline
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Default Does a dirty IAT sensor affect A/F

Hello all well I finally figured out why my truck was surging after the new cam install. After checking everything I finally checked the IAT and it was black on one side. So I removed it and cleaned it now the surging has completely gone away. My question is will a dirty IAT sensor effect my A/F. Im wondering if this sensor is what caused my truck to run really rich on idle and lean out at WOT while on the dyno a few weeks ago or is there something else? Thanks
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Old 07-17-2013, 11:40 AM
usmcz28 usmcz28 is offline
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If the IAT is not reading the proper inlet temps it will either reduce or increase timing and can affect A/F through that. Your A/F is generally dictated by your O2 sensors and their voltage reference to the PCM
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Old 07-17-2013, 04:40 PM
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Most engines go into open loop at WOT so the O2 sensors aren't being used. This is why tuning is needed otherwise the ECU would just use O2 readings to adjust the mixture for whatever mods are installed.

MAP, CTS, and IAT are the biggies at WOT.
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