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LOTS of things. In rough order of likelihood:
- Pedal bushings (most common if you haven’t done the pedal box + gone brass)
- Throttle linkage + bushings in the tunnel: there are three of them. They disintegrate over time, go yellow, and can bind. < $10 to replace although a little fiddly in the tunnel as you need to remove the shifter, remove/move the handbrake and get to the one in front of the shift coupler.
- Throttle console behind the intake where the linkage comes up from the trans: bushings there. Usually rubber and decay -> bind.
- Bellcrank on the trans, which also has bushings that go bad over time.
- Return spring(s) failing
Given how safety critical this is: make a list and work on through it. The pedal box is the biggest PITA but it’s all cheap work.
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1978 911 SC (3.2SS, EFI, 993SS cams + the trimmings)
Dynamic Comp Ratio calc: https://dcr.questionable.services/ • Gearset & Ratio calc: https://ratio.questionable.services/
Last edited by silverlock; 09-07-2025 at 03:31 PM..
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