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Weber IDF troubles

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baja burley Officially Full-On Dubber

325 posts · joined Sep 2008 ·

#983532
Hi lads, I've just pulled my bug out of the shed again after about 5 years of neglect🥲

Went and did a quick tune on the carbs ( twin 40IDF) and just cannot get the thing to run nicely, 1600dp btw. It's running 50 idles, so jetting is not an issue.

I did notice a dribble from the accel pump jet? The little grey one that pokes out the side of the barrel. It's the one that squirts when you pump throttle, just not sure what the 'jet' is called..

Is this a problem seen much before? What needs fixing?

This thing uses a ridiculous amount if fuel too.

Cheers
Luke
There are three types of people in this world - people who can count and people who can't....

Bizarre Moderator The artist formerly known as blue74l

12,787 posts · joined Aug 2002 ·

#983535
Probably gunk caught under the needle and seat
Futue te ipsum!!!

baja burley Officially Full-On Dubber

325 posts · joined Sep 2008 ·

#983536
Is it easy to get in there and clean it out?
There are three types of people in this world - people who can count and people who can't....

ian.mezz I never said, I could write or spell

3,913 posts · joined Sep 2004 ·

#983538
youtube is your friend
.
😂🤪😂🤪😂
car forums. where a lot of peoples good intentions end up taking a good old car off the road forever never ever to see the road again. 🥲

Performance Upholstery Officially Full-On Dubber

229 posts · joined Nov 2013 ·

#983653
Hi mate, I believe I sold you these carbs years ago... My name on here at the time would have been bajamick or 1916baja... I did tell you they needed an air leak fixed on the butterfly shafts. If you have not had this fixed they won't run properly. Then they'll need to be jetted to suit your motor. They were jetted to suit my 1916cc.

Hope this helps.
Mick.
Performance Upholstery
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0439002870
performanceupholstery@live.com.au
Mt Gravatt east Qld.

mnsKmobi Wolfsburg Wizard

589 posts · joined Aug 2002 ·

#983739
baja burley wrote:Hi lads, I've just pulled my bug out of the shed again after about 5 years of neglect🥲

Went and did a quick tune on the carbs ( twin 40IDF) and just cannot get the thing to run nicely, 1600dp btw. It's running 50 idles, so jetting is not an issue.

I did notice a dribble from the accel pump jet? The little grey one that pokes out the side of the barrel. It's the one that squirts when you pump throttle, just not sure what the 'jet' is called..

Is this a problem seen much before? What needs fixing?

This thing uses a ridiculous amount if fuel too.

Cheers
Luke
What is the fuel pressure? Could be too high.

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 ·

#983745
If they have been sitting for 5 years then you really should pull them down for a freshen up. Old fuel can leave a varnish like residue in carbs that can easily block passages and cause you grief.

Oxidisation of the housings etc can also cause problems with blockages, and O rings will deteriorate.

Its worth taking the hour or so to do a pull down and clean 👍


baja burley Officially Full-On Dubber

325 posts · joined Sep 2008 ·

#983887
Really Mick? I vaguely remember the 1916 chat! Far out that was a long time ago. It seems I should pull them down and rebuild anyway. I cant remember any chat about air leaks, was too long ago. When you say it was in the shaft, do you remember if it was a damaged butterfly or something else?
There are three types of people in this world - people who can count and people who can't....

baja burley Officially Full-On Dubber

325 posts · joined Sep 2008 ·

#983889
I did check the idle jets - 50 jets. Surely the others can wait until its idling and running sweet to be swapped and dialed in yeah?
There are three types of people in this world - people who can count and people who can't....

baja burley Officially Full-On Dubber

325 posts · joined Sep 2008 ·

#983891
Fuel pressure is whatever is coming from the factory pump
There are three types of people in this world - people who can count and people who can't....

mnsKmobi Wolfsburg Wizard

589 posts · joined Aug 2002 ·

#983908
baja burley wrote:Fuel pressure is whatever is coming from the factory pump
Apparently factory pumps can put out higher pressure than the webers can cope with. I changed to a Carter rotary because my stock pump stopped putting out anything!

Here is a thread on The Samba which has lots of useful stuff about putting dual carbs on a T1 engine, including about fuel pressure:

http://www.thesamba.com/vw/forum/viewtopic.php?t=572107&postdays=0&postorder=asc&start=0

Performance Upholstery Officially Full-On Dubber

229 posts · joined Nov 2013 ·

#984323
The air leak was behind the linkage on the left hand carbie I believe... Between the carb body and the butterfly shaft. ( the shaft the butterflies are bolted to) I did explain this, that's why they were so cheap! It's why I could never get them to run right .. Always had an erratic idle. I went to kadrons and sold the whole kit with linkage and manifolds for like $200... Spray some wd40 or something like that on the 2 throttle linkages when it's running like crap and watch the revs change. They need rebuilding including that seal.
Performance Upholstery
Cars, boat seats, furniture and more!
0439002870
performanceupholstery@live.com.au
Mt Gravatt east Qld.