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The FAQ's have a lot on this. With my 1990 760 Turbo, I had the same stuttering on occasion, but normally it would just die and restart normally when I had rolled to the side of the road. As it happenned more often, I checked to see if the tach needle would fluctuate when I cranked it and it did not start.
The FAQ's led me to many possible causes, but the most prevelant were the FP relay and the radio supression relay as well as bad grounds. I resoldered the relays (childs play...trust me, you can do it). Apparently, on some 700's the actual plug for the relay which will look melted...I think Volvo actually calls it the fuel injection relay.
The point is, none of these take much time or cost any money. If they do not fix the issue there are some references to the ignition system ballast and so on.
Onkel Udo
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