As per subject really.
Since its service at a VW specilist who are claiming its nothing they have done and would cost me a "exploratory" charge to diagnose the fault. Basically when ever I put it in to park the revs bounce all over the place, never over 2000 rpm. Although it could be a fault that co-incided with the service.
I tried a throttle body with VAG-COM, which would not let me do it. I have the full verson aswell.
So far I have tried cleaning the throttle body with carb cleaner sprayed on a clean rag around it, top and bottom, it was removed. I put it back on and tried to align it again with no joy.
Also I sprayed some electrical cleaner on the electrical contacts in the air flow meter which a local ex vw tech said to try. He also said to remove the throttle body and remove the black cover on that which houses the throttle position sensor I think he called it and pray some electrical cleaner on it and let it dry out in a clean place as even a small bit of dust can play havoc. Neither have worked.
He reckon a bouncing idle in park indicates a vac leak which I cannot find for the life of me, he said usually its the plastic pipe from the air flow meter to throttle body which is gets small splits. So I replaced that. It didn't work.
He thinks its now time to start replacing the offending parts starting with the air flow meter, and if that fails then the throttle body. He suggested the air flow pipe first as its the cheapest.
Its one or the other he says so its 50/50. I think the AFM is about £60 from GSF, he recommended a genuine one from VW though.
Has anyone any other ideas on what might be causing this or should I just replace the AFM first hope it goes away then the throttle body ?
It could be time to let a garage take care of it but that will cost more and then parts etc. I reckon they will only diagnose it as one or the other ? or possibily find a vac leak some where else ? (although my friend couldn't find a leak, he was spraying wd-4o around pipes listening for engine tone changes I think he said he was doing and nothing)
Pfffft what do you guys reckon ?