I removed my intake resinator and when I was done I started up my STi and found it left a CRUSE light on on my dash. So I fugured no biggy just remove the negative lead on the battery and maby it will go away... IT DID ... Now about an hour ago I dyed all of the blubs in the stock deck, climite controle and the key ring ( to red ) but when I did it I removed the negative on the battery agan .... So to make a long question short ................. What dose removing the negative do to the ECU (computer) and will it affect Performance, Gas milage, or any thing in the car and for how long?????????