First things first - you shouldn't have any slack in the gas pedal. You can adjust the slack out of the linkage completely, as long as the pivot bushings are OK. That might take care of your problem.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma