Cold start issues lol AEM never !!! Sorry about your luck that you never had someone that knew what they were doing.. I'm very sorry about your bad experience ..Also you get what you pay for ! Cheap tuner's = Cheap Tune / Cheap Work..
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Glenngieering
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"AEM Speed Density Proper Real time Tuning Specialist"..... I DO NOT TUNE ROM/MAF SYSTEMS ! Glenngineering