Originally Posted by theSMELSINATOR
you didn't take it into the dealer when this problem first appeared?
The car has since been to a dealer who replaced the crankshaft sensor and claimed to have solved the problem. It was sort of ok for about a week, had one or two bad mornings only but it is now back to the initial symptoms where it will not start easily on cold mornings and needs to be warmed up before it can be driven. We are moving right into our winter here so the mornings are getting colder so this may be why it happens more. Cant recall what the temperatures were like in when it originally started but we have had very mild weather so far this year, no real cold days yet.
Anyway I expect it won't be drivable again within a few weeks if it follows the same pattern as before. The check engine light has never come on that I can remember.
I am thinking O2 sensor because, when I warm it up, the point where it starts running ok is not linked to the engine temperature. Basically on very cold (below 7deg C) mornings the engine can reach full temp but the car is still hesitating and jerking, on other mornings the engine temp is just above blue and it already goes fine. My thinking is that on the colder mornings the exhaust, together with the O2 sensor, is taking longer to warm up. Going to climb under it tonight to try locate the O2 sensor and check what I need to change it.