04" S80 T6 won't start below 20 degrees F

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I have a 2004 Volvo S80 T6 that starts fine until the temp drops to at or below 20 degrees F. The engine turns over fine, however it will not start. Opening the air filter cover and spraying a small amount of startring fluid will usually get the car to start. I have tried unplugging the Mass air meter and no luck. This car has in the past 20K had a new throttle body, new mass air sensor, new fuel pressure regulator, new crank position sensor and new spark plugs. Any ideas would be greatly appreciated.

Thanks