Vacuum advance

[eegdivad]

Hi everyone..I'm looking for some help with my vacuum advance. I have a 1983 1.9 waterboxer 'DG' engine with a Pierburg SE3 carburettor. I have recently had the carburettor rebuilt and have now put it back on the engine. The carb seems to have 2 vacuum nozzles..one black looking one white looking. However, the carb only has one vacuum pipe attached.I cannot recall the carb having a vacuum pipe to the distributer when I took it off. Does this set up have a vacuum advance to the distributer, and if so , which nozzle does it attach to on the carburettor? I noticed that when I attached a hose from the carb to the vacuum advance unit it advanced it by 17 degrees.
Very grateful for any advice you can give me.
Thanks.

Dave.

[Aidan]

wrong advance unit used, the dg is single pull down, the DJ one is the twin version. Correct one available from brickwerks. Check the actual disi part number stamped on above the bosch one, vw number should be 025 905 205 folled by one or two letters the letters are the important bit

[eegdivad]

Hi Aidan,
thanks for your reply. Can i just clarify your response? My distributor has a vacuum advance attached to it with a single nozzle, however, there is no pipe linking this to a nozzle on the back of the carb. Is it simply a matter of linking them with a pipe? Or perhaps my distributor could be a mechanical advance and so the connection with the carb is redundant. The carb has one nozzle with a hose going to the airbox but the other nozzle on the carb is not connected to anything so I think this should be connected to the vacuum advance unit. I know this may all sound a bit thick of me but I really cannot recall the vacuum advance unit having any pipe coming off it prior to removal of the carb for refurbishment..and the van has taken me around Europe before this!
Your reply leads me to think that I need to change my vacuum advance unit for a different type. Is that correct?
Kind regards
Dave.

[Aidan]

Dave,
sorry my misreading of the post
you have to connect the disi to the back of the carb and yes the second connection on carb goes to airbox and thence to preheater bypass flap.
All dg's have the vac advance, without it you'd be running lean and gutless generally if it had been cranked up richer to run it would have been pretty bad on fuel and still gutless
You may have to check the timing and the carb settings when it's all reconnected in case it was messed with to make it run.

[eegdivad]

Brilliant! Thanks for that Aidan, you're a gent.

Dave

[fairwynds]

Hi
have just replaced mine from Brickwerks...and now van runs like a dream!
My thread:-

https://club8090.co.uk/forum/viewtopic.php?f=2&t=59678" onclick="window.open(this.href);return false;

Good luck