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SVTPerformance's Chain of Restaurants
Tuning À la carte
idle rpm w/ ac on?
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<blockquote data-quote="Vinnie_B" data-source="post: 16817674" data-attributes="member: 201678"><p>I think that this might help you with your AC RPM issue [USER=16477]@DSG2003Mach1[/USER] </p><p></p><p></p><p>*Give it a try</p><p></p><p></p><p><strong>Idle Air Trim</strong></p><p></p><p>Idle Air Trim is designed to adjust the Idle Air Control (IAC) calibration to correct for wear and aging of components. When engine conditions meet the learning requirement, the strategy monitors the engine and determines the values required for ideal idle calibration. The Idle Air Trim values are stored in a table for reference. This table is used by the PCM as a correction factor when controlling idle speed. The table is stored in keep alive memory (KAM) and retains the learned values even after the engine is shut off. A Diagnostic Trouble Code (DTC) is output if the Idle Air Trim has reached its learning limits.</p><p></p><p>Whenever an IAC component is replaced or cleaned or a service affecting idle is performed, it is recommended that keep alive memory be cleared. This is necessary so the idle strategy does not use the previously learned Idle Air Trim values.</p><p></p><p>To clear the keep alive memory.Resetting the KAM returns the PCM memory to its default setting. Adaptive learning contents such as idle speed, refueling event, and fuel trim are included. <span style="color: rgb(184, 49, 47)">To clear the continuous DTCs in the PCM and have it reset the emissions monitors information, is also part of a KAM reset. </span></p><p></p><p><span style="color: rgb(255, 255, 255)">After the KAM has been reset, the vehicle may exhibit certain driveability concerns. It is necessary to drive the vehicle to allow the PCM to learn the values for optimum driveability and performance.</span></p><p></p><p>Once keep alive memory has been reset, the engine must idle for 15 minutes (actual time varies between strategies) to learn new idle air trim values. Idle quality will improve as the strategy adapts. Adaptation occurs in four separate modes. The modes are shown in the following table.</p><p></p><p></p><p></p><p><strong> IDLE AIR TRIM LEARNING MODES</strong></p><p></p><p></p><table style='width: 100%'><tr><th><p style="text-align: center">Transmission Range</p> </th><th><p style="text-align: center">Air Conditioning Mode</p> </th></tr><tr><td>NEUTRAL</td><td>A/C ON</td></tr><tr><td>NEUTRAL</td><td>A/C OFF</td></tr><tr><td>DRIVE</td><td>A/C ON</td></tr><tr><td>DRIVE</td><td>A/C OFF</td></tr></table></blockquote><p></p>
[QUOTE="Vinnie_B, post: 16817674, member: 201678"] I think that this might help you with your AC RPM issue [USER=16477]@DSG2003Mach1[/USER] *Give it a try [B]Idle Air Trim[/B] Idle Air Trim is designed to adjust the Idle Air Control (IAC) calibration to correct for wear and aging of components. When engine conditions meet the learning requirement, the strategy monitors the engine and determines the values required for ideal idle calibration. The Idle Air Trim values are stored in a table for reference. This table is used by the PCM as a correction factor when controlling idle speed. The table is stored in keep alive memory (KAM) and retains the learned values even after the engine is shut off. A Diagnostic Trouble Code (DTC) is output if the Idle Air Trim has reached its learning limits. Whenever an IAC component is replaced or cleaned or a service affecting idle is performed, it is recommended that keep alive memory be cleared. This is necessary so the idle strategy does not use the previously learned Idle Air Trim values. To clear the keep alive memory.Resetting the KAM returns the PCM memory to its default setting. Adaptive learning contents such as idle speed, refueling event, and fuel trim are included. [COLOR=rgb(184, 49, 47)]To clear the continuous DTCs in the PCM and have it reset the emissions monitors information, is also part of a KAM reset. [/COLOR] [COLOR=rgb(255, 255, 255)]After the KAM has been reset, the vehicle may exhibit certain driveability concerns. It is necessary to drive the vehicle to allow the PCM to learn the values for optimum driveability and performance.[/COLOR] Once keep alive memory has been reset, the engine must idle for 15 minutes (actual time varies between strategies) to learn new idle air trim values. Idle quality will improve as the strategy adapts. Adaptation occurs in four separate modes. The modes are shown in the following table. [B] IDLE AIR TRIM LEARNING MODES[/B] [TABLE] [TR] [TH][CENTER]Transmission Range[/CENTER][/TH] [TH][CENTER]Air Conditioning Mode[/CENTER][/TH] [/TR] [TR] [TD]NEUTRAL[/TD] [TD]A/C ON[/TD] [/TR] [TR] [TD]NEUTRAL[/TD] [TD]A/C OFF[/TD] [/TR] [TR] [TD]DRIVE[/TD] [TD]A/C ON[/TD] [/TR] [TR] [TD]DRIVE[/TD] [TD]A/C OFF[/TD] [/TR] [/TABLE] [/QUOTE]
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SVTPerformance's Chain of Restaurants
Tuning À la carte
idle rpm w/ ac on?
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