macmori

I have a 2001 v70 2litre turbo with 160000 miles.In the past few weeks the cars idle becomes erratic when the car is stopped and the engine hot.A mechanic told me that the head is probably gone and that it was very common on these models.
However i pointed out that it never overheated,there is no condensed vapour coming from the exhaust and the heater still blows hot, good signs of a sound head?
The car engine will continue to rev slightly then drop to normal and so on until eventually it cuts out.
the Volvo dealer said that it was probably an idle control sensor fault.
Who is correct.
Any help greatly appreciated
Macmori

sgtcarl

I would go with what the dealer told you. Maybe the other guy just wants to make some money. Maybe not. I don't know if that particular engine had problems with trashing heads, but it doesn't seem likely that would be your problem. Look at it this way, if it were the head, wouldn't the dealer know?