ok so I don't know much about this tuner stuff I do automotive out of my garage and own a tow truck so often people call me to tow there vehicals to the junk yard some of which I buy and fix and sell well recently I just bought a 99 saab 9-3 turbo 5 speed lady just bought it drove it 8 days and started puking anti freeze her friend told her it was probably a head gasket short story garage told her 1500 to do head gasket she didn't have the money so called me I bought it for scrap $350 really nice car great shape ended up being the water pump **** the bed she told me the guy she bought it from did all kinds of work to it usto ice race it I thought the guy was feeding her **** so I found it has a rather large aluminum inter cooler turbo blow off valve cold air intake now and who knows what els for the part I have no idea about I found a wire in the glove box looks like a monitor hook up for a pc lead it back gose to the ecu now I remembered seeing another ecu in the trunk looked at it it says sgr first two words I belive were in sweedish then r stand for racing then wrote on it was 9-3 S4 is the S4 mean stage 4 what is this 3 wire lead comen off of the wireing harness from the ecu any info on this would be great is that ecu something I can plug in and got more hp out of it or do I need software
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