My '73 fastback just had a tuneup & oil change at the local shop, including new distributor, wires & points.
She runs fine at low speeds, but now at highway speeds (50-60mph, 3K rpm) the engine surges somewhat.
Seems to me like a carb problem (float maybe), but she ran OK before and I don't think they messed with the carb. Any ideas?
For what it is worth, I am experiencing a surge around 1500 RPM in fifth around town on my '85 GT. After adjusting timing both retard and advance, I am now suspecting a lean condition and will try rejetting the primary side of my Holley 650 cfm carb.
Any possibility that is your problem too?
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