What is this for?

[Kate FitchGerald]

Right, I figured that the center switch is +12V from
bat.

How does the car react if the the throttle switch
doesn't work?  Mine doesn't work, but, to me since I
got this car recently and probably had the problem
since then, I can't tell since I can't compare it to
when the switch use to work.  If the switch works, to
u get more power (ie, richer fuel).  Does not have the
switch working increase gas comsumption?

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