Quick update , error code is P1152 which im told is connected to the fact the car is struggling to start so fumes out of exhaust are wrong
Seen on another forum it says possible cause of P1152 is exhaust system leaking and the weird thing is it is blowing a little , but was only replaced about 10mths ago for a brand new full system , but guessing this wouldn't cause start problems anyway
Not a car person but still points back to either starter motor or battery . Battery sits about 16.5 while car is running then starts to drop as soon as ignition off
Will go out and check in a couple of hrs see what it has dropped to