help with my mates car...

[Wazzzer]

Hi people, I need your help.

I'm due to look at my mates mk3 tomorrow to try and cure his running probs but I would like an idea of where to start...

Here's his description

Right, initially the revs would dive when you dip the clutch, which was only a problem when coming to a stop, as the car would die. Now it's evolved into erratic revs, loss of power, and cutting out. It seems to be ok when cold, and starts to manifest after 10 min+ of driving. My uneducated guess is something to do with the airflow. I've heard there's a valve that can get gummed up, which can cause issues. But I wonder if it's airflow meter playing up - although I'd have thought the meter would cause issues from cold?

Any ideas?

[LowlifeDubber]

What engine would be a good start

[*tell*]

if its a mk3 i would start with scanning it.

[dom]

Hi people, I need your help.

I'm due to look at my mates mk3 tomorrow to try and cure his running probs but I would like an idea of where to start...

Here's his description

Right, initially the revs would dive when you dip the clutch, which was only a problem when coming to a stop, as the car would die. Now it's evolved into erratic revs, loss of power, and cutting out. It seems to be ok when cold, and starts to manifest after 10 min+ of driving. My uneducated guess is something to do with the airflow. I've heard there's a valve that can get gummed up, which can cause issues. But I wonder if it's airflow meter playing up - although I'd have thought the meter would cause issues from cold?

Any ideas?

This is a classic sign of a dirty throttle body, giving it a really good clean with some carb cleaner would be a good start 

[spunkymonkey]

Ecu temp switch maybe if its only running rough when warm.

[tweed]

Ecu temp switch maybe if its only running rough when warm.

+1

[Wazzzer]

Sorry guys MK3 8v.

I'll give the throttle body a clean then, I've got vag com so will give it a scan too. Temp sender sounds fimiliar from the mk4 so will look there too.

Ill let you know how it goes

[Wazzzer]

Quick update, went out in it last night and nothing went wrong lol

But I did notice the revs dropping when coming to a stop if you dip the clutch. Also checked with VAG COM and nothing on there. Should the ECU take around 5 secs to recognise that the MAF has been plugged back in?

Any more input would be appreciated, we're stumped. 2.0 GTI 8V