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[cleanwhite90gts]

Actualy it is not supposed to run constantaly but it could be triggered as a cheap way richen up the air/ fuel mixture without having to invest in a whole new set of larger injectors.

For istance one could cause it to open when spraying N2O to prevent detonation,or rig up a hobbs switch to activate it at a pre set boost level when running a turbo to add extra fuel preventing a lean condition.