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Sun Nov 08, 2015 4:02 pm

I bought a pair of Weber IDF 40 carbs used and the PO put on the fuel enrichment block off plates but removed the Pistons and springs and keepers so the carbs run way too rich. I can't find these parts anywhere, does anyone have any information on where to get them? Thank you

Sun Nov 08, 2015 4:09 pm

They don't get used in most VW applications. They are damned near impossible to get replacements for, but all you need to do is tap and plug the hole in the base of the carburetor. A couple of small set-screws and the right sized tap and you'll be all set.

Sun Nov 08, 2015 4:32 pm

Derek Cobb wrote: They don't get used in most VW applications. They are damned near impossible to get replacements for, but all you need to do is tap and plug the hole in the base of the carburetor. A couple of small set-screws and the right sized tap and you'll be all set.

Easiest fix... Yeah...

If you want the actual pistons you might get them here..

http://piercemanifolds.com

Dale

Sun Nov 08, 2015 5:34 pm

Not sure what I'm not understanding here, but when I have carb apart and spray carb cleaner in that bottom hole it doesn't seem to go anywhere

Sun Nov 08, 2015 8:49 pm

The ports on bottom should direct connect to enrichment plunger bores... If you can not get carb cleaner through then its possible ports/passages are already plugged....

You should be able to follow the passage becasue of the obvious casting bulges that define passages and find either they are plugged or not even drilled...

Dale

Sun Nov 08, 2015 9:20 pm

Thanks for your input. I thought that the cleaner should spray through, it looks like it should. Maybe they are not drilled and carbs never had plungers in there to begin with. I guess that's why all of the exploded views of IDF carbs don't show those parts. Perhaps the rich condition I experienced was due to too large of jets or maybe someone drilled them out. I will have to investigate that

Sun Nov 08, 2015 9:23 pm

69sunroof wrote: Thanks for your input. I thought that the cleaner should spray through, it looks like it should. Maybe they are not drilled and carbs never had plungers in there to begin with. I guess that's why all of the exploded views of IDF carbs don't show those parts. Perhaps the rich condition I experienced was due to too large of jets or maybe someone drilled them out. I will have to investigate that

let us know - it would be good Weber general tuning knowledge :)

Mon Nov 09, 2015 9:20 am

69sunroof wrote: Thanks for your input. I thought that the cleaner should spray through, it looks like it should. Maybe they are not drilled and carbs never had plungers in there to begin with. I guess that's why all of the exploded views of IDF carbs don't show those parts. Perhaps the rich condition I experienced was due to too large of jets or maybe someone drilled them out. I will have to investigate that

New EMPI HPMX (generation 3) has completely done away with everything to do with enrichment circuits, they have new casting that don't even have openings for cover plate...

Dale

Fri Nov 27, 2015 7:15 am

My older 44 IDF's were never drilled for the enrichers, not all carbs had them.

Tue Jan 17, 2017 8:25 am

If the springs/plungers are installed, and the choke attachment is blocked off (block off plate installed), is there any reason to tap and plug the ports?

Tue Jan 17, 2017 1:06 pm

txoval wrote: If the springs/plungers are installed, and the choke attachment is blocked off (block off plate installed), is there any reason to tap and plug the ports?

No.

Thu Jan 19, 2017 1:13 pm

probably not. but I havent for my self traced the entire circut. I have however got brain fade and shot that shit across the shop........ :twisted: but withen a hour or so(2) I had it back togeather. I was thinken about trying to use that system for a AC kick up.....but I doubt I will need it...I hope.

Thu Jan 19, 2017 2:57 pm

Yeah, first time I messed with the damn things, the spring shot the washer across my damn garage. I looked all over the place and was about to give up.

Somehow it landed in the carb throat of the carb that was sitting next to it...damn near straight up and down. I was crawling all over the floor like an idiot

Thu Jan 19, 2017 4:47 pm

[quote="txoval"]Yeah, first time I messed with the damn things, the spring shot the washer across my damn garage. I looked all over the place and was about to give up.

Somehow it landed in the carb throat of the carb that was sitting next to it...damn near straight up and down. I was crawling all over the floor like an MARK.
there I fixed itr for ya.... I was so stupid i did it 2 times. once about 13 years ago when I got the carbs new and was blowing them out , and again....last week :shock: funny think I knew to put my fin gers over them on the first carb I did last week but the next day.....on the floor I went. I dont have shit fer brains....not sure I have any brains up there at all.

Thu Jan 19, 2017 8:07 pm

mark tucker wrote: I dont have shit fer brains....not sure I have any brains up there at all.

We have known that for quite some time....

Dale

Sat Jan 21, 2017 12:53 pm

but it's the ones with shit for brains you have to watch out fer.....I think there brains are peddle operated.. :? ..they seen to always be peddling some shit.. :o ..usually over priced&hyped up shit... :wink: