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skipping/missing in certain rpm range



OK, here's the current problem with my '77 spider - there has been a string of problems lately.

The car misses/skips between 2000 and 3000 rpm when accelerating even moderately hard or harder. It's fine above and below that rpm range. It has a marelliplex ignition from shankle.

This started after I replaced the fuel cutoff solenoid.

It has new wires, new plugs, new distributor cap and rotor. New fuel filters (both). New ignition control module (from a different problem). I adjusted the fuel cut off with a procedure I found on the web - hold at 2500 rpm turn it lean until it misses, then rich until it stops increasing rpms, then back 1/4 turn.

I'm out of things to check. Any ideas?
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Ken Tubman
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