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>The symptoms: It starts instantly. When the rev's are below about
>2500, it misses pretty bad. Above 3000 RPM's it seems to run fine.
>It misses at idle also.
First thing I would check is the spark plug wires. If one is arcing to
ground from time to time, the old 5 will run ruff. My 4000 Q exhibited the
same symptoms and I finally found it by trial and error. ---JCG.
Um, yes. I ended up removing the metal RFI shield around my distributor
because of intermittent arcing (mostly when it was cold and wet...). Any
arcing will generally make a very sharp snapping sound, and should be
quite visible if it's dark (unless of course the arcing is buried inside
the cable guide where you can't see it). It causes a random and inter-
mittent "stumble" usually at low rpms, and of course once the engine warmed
up, the moisture condensing on the distributor housing dried right off
(that engine compartment is *toasty*), so I kept trying to blame the cold-
start/enrichment circuitry . . .