Misfiring Vw Golf Mk4 Help!

is the t piece that you are refering to more of a y shape, one tube leading from the crankcase, another aiming downwards and one aiming to the back end of the engine bay? if so these tubes are the ones that were changed that i mentioned earlier on in a post. i have changed 3 in total, the y shaped tube from the crankcase, the pipe from that aiming downwards and another somewhere that my mate at VW spotted had a slit in it. if these are the pipes that you reffered to then i have already eliminated this as a cause.

on another note, the rippling sound that i refered to before that happens when the turbo spools down seems to be coming from around the air box to the right of the bay. the car hasnt lost performance but im wondering if a valve is failing or something, as it sounds like a turbine cutting a flow of air. its hard to describe and it may not be a problem, i just cant remember it sounding like this...

im going to have to face up to taking it to an independant garage to diagnose. i dont think that VW (in my opinion) are the most clued up on fault finding. kinda rely on Vagcom to point them directly to the problem.

Was it this hose?

ahh no, the one that i replaced was the one to the right of that picture and the one that connects to that, that aims down into the engine bay. ill have a look at the condition of the one you mentioned and get back to ya

as good as i can see this pipe looks good, its possibly the 3rd pipe that was changed as it looks cleaner than the rest. it connects to the same manifold as the throttle body inbetween the 2nd and 3rd cylinders doesnt it (just to clarify). I can see some of the brass looking material from this manifold that the pipe sits on so it might not be seated exactly as it shud be, saying that, it has got a ziptie on it so it should be air tight, it just looks like to could slide over another 5mm. would this cause an intermittent misfire tho?

On mine the pipe looked perfect, only when removed and pressed between my fingers could I see two splits in it.

was you experiencing intermittent misfires? the car performs fine when warm and sometimes when cold.

Hi Shleng, I think, reading through the post you have created, you have already identified and then over looked the problem you have described, the noise you are hearing is commonly known as Turbo Chatter, if you have a look at some of your posts earlier in the thread, you were going to check the Diverter Valve, did you do this ?

All I was experiencing was a slight pulsing under boost, which I still have-somehow I never seem to find the time to fix my own car!

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Originally Posted by Nutty

Hi Shleng, I think, reading through the post you have created, you have already identified and then over looked the problem you have described, the noise you are hearing is commonly known as Turbo Chatter, if you have a look at some of your posts earlier in the thread, you were going to check the Diverter Valve, did you do this ?

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Yeah ive changed the diverter valve, swapped it for a replacement Bosch. There was no way of guaranteing that my other wasnt failing at random times so i changed it. Im going to look into this turbo chatter and see what i find. Thanks for helping.

from what i can find it looks like some people actually try for this effect by changing to a different diverter valve. i was just worried that my turbo was on its way out or a valve wasnt opening to equalise the pressures at either side of the turbo or something. hmm, anybody got any advice on the removal of the inlet manifold? im thinkin if i remove this, i can chack all of the breathers that im struggling to examine.