What is the little electric thing on the motor

Tiny
ANONYMOUS
  • 1997 SUBARU FORESTER
  • 150,000 MILES

What is the little electric thing on the motor. It has 2 screw and you loosen them to adjust or turn and the idle tune changes. My forester is missing and I've put the pointed plugs in and still misfires. I turned that thing and is better now, but i'm sure it is not suppose to be turned or tuned. I just need the name of it and if replacing it, would make a difference.

Thanks
Billy

Thursday, February 21st, 2013 AT 10:23 AM

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