I'll give a third vote that the ignition is the
culprit.
I had the exact same problem, but at 3200 rpm in 4th,
traced it to excessive wobble in the distributor
shaft; had the dist rebuilt: problem fixed.
William
'74 TR6
--- "Theodore R. Stevens" <trstevens@earthlink.net>
wrote:
> At 12:41 PM 11/12/2003, Al Graffam wrote:
> >[snip]
> >my '74 flattens out, bucks and looses power in the
> higher gears
> >@ approx. 4000rpm in 4th and 5th.
> >[snip]
> >Ignition system looks ok.[snip]
> >Note: the problem has been intermittent.
> >
> >Al Graffam Suffield CT.
>
> I vote for the ignition system being the culprit.
>
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