if you DONT have a check engine light you can do it with a VOLT meter... though I dunno how it works if you converted to mass air... I'll assume it's the same... here's the picture on how to set it up

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'89 GT Convertible:
TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit
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