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Hi Andrew,
Welcome here. There's lots of Volvo wisdom and many willing to part with it.
One thing I learned pretty quickly; unlike with domestics and some Japanese cars I've owned, the fuel filter is not a suspect with a symptom like yours. It is huge (as you may have seen) and not likely to plug during the life of the car. Fact is, unless you or the P.O. (previous owner) have abused the gas tank and run on empty a whole lot, the filter will rust from the outside before clogging.
And, a clog is made apparent by losing power on long hill climbs at high speed, not suddenly, in traffic.
Let's imagine you've already bought the filter and want to change it anyway. The books (even the good ones, which Chilton's is not) are all wet about this procedure; claiming all you need to do is pull the fuel pump fuse while it is running and let it run out of pressure. Wrong because there is no "fuel pump fuse" regardless of the marking you see on the fuse panel. The fuel injection fuse is the blade fuse that gets dirty and loses contact, located near the battery under the hood. If you pull that fuse, the whole injection system shuts down without lowering the pressure one pound.
To relieve the pressure, we all just wrap a rag around the connection between the fuel rail and the rubber-covered nylon fuel line, and loosen it with a pair of line wrenches.
Changing the filter is best done with an impact wrench. Most all first-timers will try with a pair of crescent wrenches or channel locks, only to break the hard plastic (nylon) line between the filter and the pump. Or worse, break the line at the filter's output. Those banjo bolts do not come off easily with hand tools. The nylon lines are expensive.
Your symptoms sound much more like the common troubles that beset a 90 240; i.e. that blade fuse I mentioned (dirt) and the fuel injection relay (solder connections) above your passenger's toes.
Not sure how you determined it was fuel and not spark (crank position sensor), or if you ever got it started again (timing belt?), but I am pretty sure replacing the fuel filter will only bring you more grief.
--
Art Benstein near Baltimore
The reason a dog has so many friends is that he wags his tail instead of his tongue. -Anonymous
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