850 T5 Non Starter

Hi, My 850's been sitting for a couple of weeks and now won't start. I've done some basic checks and the cars getting fuel, just no spark. Plugs are good, as are the leads and the dizzy cap and rotor. Any advice on what to check next?

I had the same problem. Turned out to be the a wire from the ECU (sorry forget which one but check my posts) going to enable the coils and fuelpump had broken at the connector. Check back from the coils. Unless they are wet and shorting to ground. Cheers, Al

When it cranks over does the engine seem 'free' from compression?? It may be that one or two of your valves is stuck open. I would get a mate to bring his car and hook it up to your battery and crank yours over continuosly for about 2 minutes (it has to be continuous to build up the oil pressure). If it still doesn't fire then wait 10 minutes then try again. It's a common fault on the 850s and the above method is what Volvo would do.

Theres definitely compression there and i can hear the fuel pump buzz when the ignition is turned on. Is there any way to test the coil with a multimeter? Also, would the crankshaft sensor cause no spark? Help!

If you have compression it could be the crank and/or cam sensors.

is there a way to test these items off the car?