Hi i have a golf mk5 1.9tdi the problem i have is that when the car is cold it starts perfect without any problem, but when the car is warm it hesitates and takes about 5 seconds to start but when it starts the car runs fine. It hesitates to start when the temperature is on 90
Iv installed new glow plugs but still has the same problem, and just today iv installed a new coolant temperature sensor but still the same problem
I researched and some forums are saying it might be the air mass sensor,
Has anyone have any ideas what could be causing this thank you