Legacy H6 2005 Mis-Fire

[nav p]

Hi All

Just a view really before I start exploring..
I have a Legacy Auto 3.0 H6 2005
In traffic when the car gets hot under the bonnet I guess, the car starts to misfire

Soon as it gets cool air going through it seems to be fine

No other symptoms at any other time...any ideas?

[nav p]

Thank you

Will take a look at pugs and coils