If the ignition is truly all taken care of, I'd have to suspect vapor lock- the fuel boiling as the temperature increases, most likely due to insufficient fuel pressure. I don't know if these cars have the same fuel pump or pumps that are in the LH injected cars.... but I assume it's a similar pump with different pressure settings.
IF fitted, I'd also suspect the ignition power stage and the engine speed sensor (crank sensor). Again I don't know if your model has either of those, but I believe it does, and either is subject to intermittent failures such as this.
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Rob Bareiss, New London CT ::: 'Roterande Fläkt Och Drivremmar!'
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