1973 Mustang - 351C Surging problem

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xzoozx@gmail.com - 08 Jul 2006 06:42 GMT

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?

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Carfan - 10 Jul 2006 11:59 GMT

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?

> My '73 fastback just had a tuneup & oil change at the local shop,
> including new distributor, wires & points.
[quoted text clipped - 4 lines]
> 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?

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