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OK I'm in late on this since I was searching for an answer to a similar situation with my '95 850. Anyway, I have had two cars that fired up cold and died immediately - a 240 and a Jag - both times it was from a catalytic converter that clogged immediately upon firing. With the Jag it seemed to try to fire but there was no noise out the back. The Volvo just did nothing. I know the cat was the cause since I pulled them out, sawed them open (purely for test purposes 8), welded the cases and stuck them back in...(non-pipe sniffing state).
My 850 just did the same and I pulled the test plug and the O2 sensor and tried again...not this time , but clogged cats can happen instantly on first start.
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