i bought my car with a check engine light on it is the biggest pig ever i think it is one of the slowest cars i owned i took it to a place to get scaned it sait it was running lean it might have a boost leak and the other code was a sensor might be bad i think he said map or something like that i dont have the code #'s though can this check engine light might have my car in a limp mode or is it just that slow i need help i need to make this car faster i would like it as fast as a stock s4

 

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