I know my linkage is kind of loose. The first 2 months that I owned my car, I thought MY throttle problem was because of that. However, one day after vacuuming my interior, I forgot to replace my drivers side fllor mat. It was like driving a new car. The pedal was nice and easy to push (but still plenty of resistance). Turns out the floor mat had been coming between the pedal and the kickdown switch. This caused me to look nearly an inch pedal action. You may want to try that.

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1989 300E 144K