2.0 tdi pd intermitent start issue
hi all I am new to the foroum. I have just bought a 2005 a4 s line , I am very happy with the car apart from one small intermitent issue. the car will at times take slightly long to start, say three revoloutions and a slight cough before it fires up. it happens regardless of warm or cold and not all the time only at times. I have checked the battery (which is the orginal so 7 yrs old) for volts when starting sits at around 10v. checked earths etc, diesel supply for leaks. I have no fault codes on the car so I am now at a loss.
I am wondering if it maybe is the nature of these pd engines? coming from a petrol which instantly starts maybe i am expecting too much? i am allowing all the dash lights out before starting..
any ideas anyone???