Starts better without blue thing!!

[Godzilla]

My Golf has been playing up as in starting for sometime. A few days ago whilst in Tescos car park a passer by said 'pop the bonnet' to which i did. He then unclipped a little blue plug  and said 'try now'......started straight away!! I thanked him and drove off. Question is what does this little blue plug do? It sits to the right of the engine bay. Does it need to be pluged in?

[Judderi]

Sounds like the 5th injector. Its there to provide more fuel when cold. Sounds like your car is overfueling and flooding.

[Godzilla]

Thanks Ben. Do i need the 5th injector, does it help when my car is running?

[Judderi]

I belive its only purpose is for cold starts. So no you would not need it when running. Take a look in the mk2 child board for the post that shows you how the k-jet system works. Might explain things better and help sort the problem.

[Gambit]

yes they can leak. causing the car to flood when left over a certain length of time

they are only used for cold starts & thats it. i have mine disconnected also