Club 80-90 Forums

Hi,

I have a 1.9DG, auto, Caravelle.

I now appear to have a vacuum leak after changing a broken choke pull down unit.

The vacuum pipes from the carb to distributor. and, carb to air filter looked OK, but have been changed anyway. Same with pipe from carb to Vacuum unit
Any other things to suggest?

Thanks for all your help.

have you checked the main vac pipe to the brake vac unit ?

Mocki wrote:have you checked the main vac pipe to the brake vac unit ?

Do you mean the pipe in the link below? If yes, then it hasn't been replaced so will be next on the list.

https://www.brickwerks.co.uk/vacuum-con ... -9-df.html" onclick="window.open(this.href);return false;

Yes thats the one.
Also...
Distributor diaphragm.
Secondary throttle diaphragm.

kevtherev wrote:Yes thats the one.
Also...
Distributor diaphragm.
Secondary throttle diaphragm.

Thanks,

Is the distributor diaphragm contained in the below link?
https://www.brickwerks.co.uk/vacuum-uni ... g-2e3.html" onclick="window.open(this.href);return false;

Also, is the secondary throttle diaphragm in the carb itself??

Thanks again.

The link shows the secondary throttle vacuum unit and the diaphragm is inside.
The distributor has a separate vacuum unit.

Thanks,

I had actually meant to post that link for distributor diaphragm rather than the secondary throttle diaphragm, sorry for the confusion. At least I was part correct?

Is the below what's needed for the distributor diaphragm?
https://www.brickwerks.co.uk/distributo ... vance.html" onclick="window.open(this.href);return false;

Is there any way of testing the vacuum unit or distributor diaphragm that's already on the vehicle? Like you can test the choke pull down unit by sucking and if it moves it's working.

Hi, jswagger,

This is the distributor vacuum unit

https://simonbbc.com/bosch-svda-bosch-vacuum-unit/

and you can test it on the van by sucking on it the same as the choke pull down, hold with the tip of your tongue and watch the timing plate in the distributor, it should move and stay put until you release the vacuum...It's easier to do with the distributor off the van...just done mine. I could get a tune out of the old one !!!

Regards
M

Did mine last year too. Bought the Powerspark one^^^^^^^^easy to replace in situ and made a world of diference to the running of the camper.
David.

Hi,

I've sucked on the secondary throttle diaphragm and the rod is moving so looks like it's working. The unit is also holding vacuum.

The distributor is not holding vacuum so looks like there is a leak? I've not changed it in the 15 years I've had the van so perhaps overdue
Thanks for the heads up on the Powerspark link, I've ordered one.

I found it through a search on here and reading lots of back posts, rude not to pass it on.

M

The distributor is not holding vacuum so looks like there is a leak?.

That's pretty conclusive, yes.

BW now stock a cheaper alternative for under 12 quid. Bargain!
https://www.brickwerks.co.uk/vacuum-adv ... 9l-dg.html" onclick="window.open(this.href);return false;

Sent from my ONEPLUS A3003 using Tapatalk

Thanks for the Brickwerks link. I've already ordered one from Powersparks

Whilst I'm waiting for the distributor part to arrive, I need to get the choke working, and also adjust the change the choke plate gap.

Do you need the choke cover back on and bimetal spring in place?