Hello zpilou,

On a 29 year old vehicle, Volvo or otherwise, it is advisable to replace the sensors and ignition components, like the ignition amplifier, if you suspect them to be faulty or are having a complete failure like you are experiencing. I also make it a habit to pull the wiring harness connector bodies apart on post 1989 vehicles and clean the contact surfaces. If you are certain that you are getting fuel through (not just to) the injectors and the engine will not fire, I would change the ignition amplifier. Check by unbolting the fuel rail and pulling the rail upward to remove the injectors from the manifold. Put 4 jars under the injectors and crank the engine (disconnect the coil wire). If you are not getting a good spray on all of the injectors, that circuit is most likely open.

David is right about the starting fluid though, as a weak spark will fire the fluid but will not fire the gas mixture.

Regards,
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Will Dallas, www.willdallas.us, www.willdallas.org, www.willdallas.com, www.dallasprecision.com 86 245 DL 222K miles, 93 940 260K miles, 88 765 GLE 152K miles, 88 780 246K miles, 93 Buick LaSabre 119,000 miles