Low RPM, no throttle response

[ExiledWeegie]

hi guys,

weird one, car is driving perfectly, but on occasion when I start her up she sits at 500rpm with no throttle response at all, then slowly it will come back to life, the revs will slowly rise to 750rpm and the throttle will come back, sometimes take 10 seconds, sometimes takes 30 seconds.

its done it a couple of times now, always when warm and always when the car is facing uphill.

any ideas? fuel draining back to the tank? throttle sensor? no codes for anything and otherwise drives great.

 

[nd-photo.nl]

Throttle body maybe? Do a TBA alignment and check if that works out ok (it will cycle to minimum / maximum positions)

VCDS Throttle Body Alignment TBA

If you have Ross-Tech VCDS, aligning the throttle body after cleaning it or replacing it is simple. Here are the steps: Connect VCDS to the car's OBDII port. Turn the key on but do not start the car. [Select] [01 - Engine] [Basic Settings - 04] Group 060 [Go!] It should say "Basic Settings: OFF"...

www.vwvortex.com

 

[ExiledWeegie]

I dont think its that, its had a few alignments in the last few months (the TB itself is only 4 months old) and this is a really random problem, it only happens under the specific set of conditions I mentioned in the first post, its a wierd one, I'll give it another alignment tomorrow just to rule it out though.