1998 golf cabrio idle problems

[markroberts]

can anyone tell me why sometimes my car stalls or the rpm drops and then returns to normal. this only happens when im driving (slowing down for a junction)

[Crasher]

The throttle body is dirty and needs removing, cleaning and then re-adapting to the ECU using a diagnostic system such as VAG-COM. I am assuming this is a 2.0L with an AGG engine?

[markroberts]

Yes it is I will sort out the throttle body to see if this cures the problem..

Cheers!!

[Hitby]

I'm intending to attempt this tomorrow as I'm having the same problem. Unfortunately though I haven't yet bought a vag-com cable - will it definitely need re-adapting or if I'm careful will it be fine without?

Thanks in advance

[Crasher]

Remove and clean it but you may find you have a high idle after. Just buying a fleaBay VAG-COM cable won’t help you, it has to be a registered version of VAG-COM so you will have to go to the Ross Tech web site and pay $99 to register the software to be able to perform the adaptation.

[Hitby]

Removing it looked a bit complicated I don't think I've got the right tools to remove some of the pipe fasteners and I didn't want to break them so I just took the air intake off and cleaned the throttle body on the car with a bit of carb cleaner and a soft cloth.

Idle is noticably smoother and when you clutch in whilst coming to a stop it catches it at about 850rpm rather than dropping to 400ish or stalling.

Thanks for the advice!

[markroberts]

Nice one I try that first and all you done was clean and no adaption or modifications needed afterwards.

Let me know as Ill have ago at this tommorrow if thats the case....