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my idle is around 650, which is kinda low considering my previous car mazda 3. it was around 750~850.. the idle went up & down for a while then I found out the maf sensor was damaged while changing to aftermarket air intake kit.
when the a/c pump kicks in it has the tendency to lower the engine rpm unless the ecm/ecu is programmed to run on higher rpm when a/c is on to overcome this. just my $0.02
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2013 Asphalt Grey FR-S MT VIN: 7086XX
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