All good till last week. Did an oil and filter change. Car starts hot and cold no problem. After driving when the car comes up to temperature it stalls on idle. Fine at about 1k rpm. Drops to about 700 or 800 and dies.

 

Is it starting to consume coolant or make the coolant opaque?

This was how my failed water seal first revealed itself, poor hot idle.

 

Look around where your hand was when swapping the filter. Make sure something hasn't changed or fallen off or torn or something. Could be coincidence but try the easy stuff first

 

Yea I went back and gave everything a wiggle. The only thing I really moved was the clip on the back of the throttle body just over the oil filter.

 

I think it’s a dodgy connector for the tps sensor directly over the oil filter.