I had a slight stumble between 2400 and 2900 and it turned out to be the plug wires leaking at the distributor cap. New cap and wires resolved. I'm sure it was leaking spark throughout the range, but that is where I noticed it.
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Emery
1988 930 coupe - Silver Metallic
3.3L w/GT35R, B&B Headers, RarlyL8 muffler, TurboKraft IC, Tial WG, tecGT based phased sequential EFI & ignition, Wevo shifter/coupler, ...
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