running rough please help

[lemski]

I'll have a word and see mate

[jezza16v]

There's also a short bit of 15mm vac pipe about 100mm long that plugs on to the RH end (looking into the engine) of the inlet manifold, this often perishes and splits on the underside where you can't see it as crud collects in it, you need to have a good feel underneath to see if its soft & split, again, when you give it welly, the split sucks itself together and all seems well, usually affects cylinders 3 & 4 most.

[redgolf]

Nice one I'll have a look later because it does feel like it's misfiring or running on less than 4 cylinders
Cheers mate

[redgolf]

http://s1027.photobucket.com/albums/y339/redgolf3/car%20vaccum%20pipe/

is this the pipe if so were does it go please

[rubjonny]

vac line doesnt look right, have a read thru this:
http://www.golfgtiforum.co.uk/index.php?topic=18871.0

near the bottom are some pics of the vacuum hoses, with some nice colouring in to make it easier to see 

[redgolf]

cheers ill try and put it on tonight and see what happens

[redgolf]

right then i done the check's you guy's said and nothing was wrong with the coil connections, i put the vacuum hose back on and it still run like poo so my brother decided to take the air filter out the box but leave the box in place and it made the world of difference so im thinking maybe the previous owner decided to TRY and tune the carb but ballsed it up and now the mixture is wrong what do you reckon.

also how do i fix the mixture (i know theres screws on the carb you play about with but i dont want to make it worse now) 

[lemski]

I think there's a single screw on the side all you do is have car running and turn the screw one way see if it improves, make sure to count the turns so you can put it back.

[redgolf]

i just took the front of the airbox off and now it idles at about 1000 rpm but then i drive and come to a stop and it idles at 1500rpm but then it runs rough again i was wondering if it could be the waxstat,
its boggy and jumpy and has poor acceleration

its running like the choke is stuck on,
if youve ever had a manual and left it on by mistake youll know what i mean

[rubjonny]

feel the carb as engine warms up. it should get boiling hot pretty quickly, basically it should get as hot as the side hose does as fast.  it needs a good coolant feed from the head, problem is on these the o'ring seal in the inlet manifold swells up and blocks the hole over time, common fault on em. this means choke and waxstat wont come off as quickly as they should:
http://www.hallvw.clara.co.uk/jettachoke.htm