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Gm LS2 and LS3 ecm’s

Practical Reflash Tuning

Relevant Module: Advanced Tuning > Diagnostic Trouble Codes

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Discussion and questions related to the course Practical Reflash Tuning

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Do these factory ecm’s use the map sensor for transient enrichment and do you guys tune the ve table after addressing the maf side of the ecm,thanks

They do use the MAP to help with transients below a certain rpm (4000 from factory). But they blend this with the MAF data. Depending on how modified the car is, you may not need to do much of anything with the VVE.

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