ABY engine not starting only when warm

[quattro estate]

My ABY engine has just started to be difficult to start only when warm?? Starts perfect from cold runs perfectly all the time but if switch it off and try to start it straight away or even after 10 or 15 mins it just cranks ?
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any ideas. I thought it was poor fuel but it’s got the best and I be topped it up at least 3 times but it’s got the seams to be getting worse??

[newsh]

Can sometimes be the camshaft hall sensor going bad, next time it won't start when hot try pouring cold water down the back of the belt cover to cool the sensor, if it then starts you've found your problem.

Have you tried pulling codes with Vagcom?

[quattro estate]

Not really checked much yet. As I’ve been away from my workshop when it fails. Certainly check the cam sensor
dont tell me you’ve got to pull the front end in it’s to replace ?

[david1980]

It can be done without removing the front end, its at the top front of the engine behind the cam pulley. There are threads on here with info/pictures.

[quattro estate]

?? big thanks