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Re: SVX difficult to start
Oxygen sensors are not used as an input to the ECU until the engine has reached normal operating temperature - it can't be that.
Knock sensors are not used as an input to the ECU during start and idle - it can't be that either.
My guess would also be the Coolant Temperature Sensor, as the way in which the engine is behaving looks as if it is not getting the required cold start enrichment.
It could also be the primary Crank Angle Sensor - from what I understand, the engine will not start or run if this sensor is malfunctioning.
Jason.
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1992 Charcoal Grey SVX - 165,000km
1992 Ruby Red SVX - 165,000km
....now with sequential VIN numbers! 
1986 Holden (Isuzu) Piazza Turbo - 225,000km
1993 Mercedes W140 S500 Coupe - 153,000km
1990 Mercedes W124 300D - 313,000km
EG33 + 4EAT + VTD AWD = SVX 
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