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Model specific boards => Golf mk2 => Topic started by: monkeyalan on 09 August 2007, 15:02

Title: idle mixture control screw ( k jet)?
Post by: monkeyalan on 09 August 2007, 15:02

is it common-ish for the idle mixture control screw to go missing. my cars in the garage at the mo and he says there isn't one on my car, hence it idles like a bag-o-sh!te.

i found this post earlier.
http://www.golfgtiforum.co.uk/index.php?topic=44695.0

can you get it from VW and if so does anyone know the part number cos I just phoned my local dealer and they say you have to buy the whole fuel distributor!

thanks  :smiley:

Title: Re: missing idle mixture control screw ( k jet)?
Post by: rubjonny on 09 August 2007, 16:18

are you sure its missing, its actually an allen head bolt and its pretty damn deep in the metering head...

Title: Re: missing idle mixture control screw ( k jet)?
Post by: monkeyalan on 09 August 2007, 17:13

seems so.

are the metering heads the same for 8v and 16v?

Title: Re: missing idle mixture control screw ( k jet)?
Post by: rubjonny on 09 August 2007, 17:15

unfortunaltly not, the air hose is much bigger.  Well I say that, I know my MK1 8v metering head was smaller, perhaps the Mk2 8v one is bigger?  You could nick the screw out of an 8v metering head though i bet.

Title: Re: missing idle mixture control screw ( k jet)?
Post by: monkeyalan on 09 August 2007, 18:05

i think he's a retard.  :angry:

i'm pretty sure theres a screw there.
i just got a stardrive screw driver in and there was some resistance when i turned it , now it won't start.
great.

Title: Re: missing idle mixture control screw ( k jet)?
Post by: rubjonny on 09 August 2007, 18:36

one thing to remember is dont touch the throttle when the allen key is in the adjustment hole, otherwise you could damage the metering head.  I hope thats not whats happened :(

Title: Re: missing idle mixture control screw ( k jet)?
Post by: monzablue16v on 09 August 2007, 18:44

Sounds like you found it then Alan! some mechanics can't understand not having a port to plug a pc in and tell them whats wrong. It moves a tiny amount and makes quite a difference to the fuelling so fiddle with it to get it back to working, tiny turn try it, tiny turn try it.

Title: Re: missing idle mixture control screw ( k jet)?
Post by: monkeyalan on 09 August 2007, 18:47

i'm not sure if i tried to start it with the tool in place.  :sad:

i'll have a go tomorrow when i've calmed down a bit.

got my eye on a couple of new metering heads just in case.

how much should i pay for a good second hand one?

Title: Re: missing idle mixture control screw ( k jet)?
Post by: monkeyalan on 09 August 2007, 19:42

if i need to change the metering head is it safe to undo the fuel lines at the head ( including supply and return) or will they be pressurised and send petrol spraying all over the shop?

i assume they will drip a bit of fuel even if not?

Title: Re: missing idle mixture control screw ( k jet)?
Post by: rubjonny on 09 August 2007, 19:49

start the car, then pull the fuel pump relay.  this should drain most of the residual pressure from the lines, then give it an hour or so just to be sure.  Crack the lines off with a rag in hand to catch any fuel and you'll be all set :)

Title: Re: missing idle mixture control screw ( k jet)?
Post by: monkeyalan on 09 August 2007, 19:51

thought as much. ta.

Title: Re: missing idle mixture control screw ( k jet)?
Post by: monkeyalan on 10 August 2007, 13:50

well, fitted a new metering head and it started...just. now it's only firing on 3 cylinders.

got a random crypton tuner coming in the morning....lets see how much good/bad he can do. 

EDIT : swapped old metering head back and it works fine now.

missing screw my arse. :angry:
the thing thats really pissing me off is that i've used him for years and he's always been cool. he's getting pretty old so maybe he's losing the plot.  :rolleyes:

I think i'll book into JBS in chesterfield so they can set it up properly on the RR.