Hey , well my audi 80 tdi has a problem starting, once i go out to it inthe morning the heater plug light will go on and the car wil start fine! but if i park the car up for a few hours and go back to it, the carwont start and it seems it isnt heating the diesel!? i replace the heater plug relay switch, no better !! has anyone ever had these problems?

 

new heater glow plugs not expensive and check there is no leak on any pipe which will result in air in the system not my 4 but air in the system is a pain