Starting problems when engine is warm

[gerallt1]

Hi, i have a CUPRA TDI 06 and i am haveing difficulties staring it when the engine is wram.

Cold starts are fine but if i go for say a 10 mile drive, leave the car and then try to start it it will just crank over and not start. after repeated continuous attempts it will finally start.

I have replaced the glow plug and there appears to be no voltage issues.

Any ideas what it may be??

Thanks!

 

[cheshire cat]

ideally vag com but you could try an ohhmeter on the water temp sender I think the resistance goes up when hot -- should output approx 1.5v double check elswhere first they have been known to read right at hot and cold but go haywire in the mid range

 

[gerallt1]

No faults logged. From further research i am directed towards the camshaft position sensor or coolant water tempreature sensor.

Will call dealers for prices for these tomorrow.

 

[Deleted member 13581]

I had this problem with a MK4 golf.

A Coolant Temp Sensor later and all was fixed. Hopefully yours is the same.

 

[gulzar]

hi mate, had the exact problem on a passat tdi 130bhp. . i had both the coolant temp sensor and crank sensor done. obviously your car may be different but i would personally get the temp sensor changed and fill it up with fresh deisel and hopefully should work. good luck.

gulzar