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croSSeduP
Samba Member
Joined: June 13, 2004
Posts: 1106
Location: Western Washington State
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 Posted: Sun Feb 15, 2015 5:30 pm Post subject: Weber Jet Doctor |
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So, I've been having trouble with my street car plugging idle jets every other time I drive it, or so it seems. The fuel is hospital sterile; there is NO WAY dirt from the fuel system is clogging things because it is utterly clean. Today I am installing these jet doctor things in my dual 44's, and I gotta say... From a shade tree engineer viewpoint it totally escapes me how these can stop the idle air from getting plugged. It's so goofy looking. Time will tell, I guess.
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Bajaman65
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Joined: January 16, 2007
Posts: 469
Location: Borrego Springs
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| Posted: Sun Feb 15, 2015 6:45 pm Post subject: |
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If you look at how the air gets to the idle jet, it's right on top of the carburetor usually under the air filter housing. Any little chunk of dirt or crud that may get past you filter can easily go down that hole and plug your jet. It is a lot less likely for the crud to go to the top of the Jet Doctor snorkel that sticks up about an inch. I have used them on off-road cars for many years where even with the best filters some crap gets on the top of the carburetor and finds its way into that little hole, not with the snorkel Jet Doctor. I have not had a 'dirt or crud' plugged idle jet in many years. Here are the ones that I make for myself.
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Dale M.
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Joined: April 12, 2006
Posts: 20379
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Sun Feb 15, 2015 7:33 pm Post subject: |
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| Bajaman65 wrote: |
If you look at how the air gets to the idle jet, it's right on top of the carburetor usually under the air filter housing. Any little chunk of dirt or crud that may get past you filter can easily go down that hole and plug your jet. It is a lot less likely for the crud to go to the top of the Jet Doctor snorkel that sticks up about an inch. I have used them on off-road cars for many years where even with the best filters some crap gets on the top of the carburetor and finds its way into that little hole, not with the snorkel Jet Doctor. I have not had a 'dirt or crud' plugged idle jet in many years. Here are the ones that I make for myself.
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Like "Bajaman65" says....
Dale
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deho
Samba Member
Joined: February 23, 2004
Posts: 62
Location: McCordsville, In.
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| Posted: Sun Feb 15, 2015 7:40 pm Post subject: |
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| I had the same problem with the idle jets then I used the jet doctor and never clog an idle jet again . They work! |
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Multi69s
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Joined: January 24, 2006
Posts: 5364
Location: Lefty, CA
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croSSeduP
Samba Member
Joined: June 13, 2004
Posts: 1106
Location: Western Washington State
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MURZI
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Joined: August 25, 2005
Posts: 5063
Location: Madisonville, La
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| Posted: Mon Feb 16, 2015 5:20 am Post subject: |
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Easy mod with brake line. 5 minutes a carb.....
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modok
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Joined: October 30, 2009
Posts: 26788
Location: Colorado Springs
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| Posted: Mon Feb 16, 2015 7:01 pm Post subject: Re: Weber Jet Doctor |
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| britegreenVWSB wrote: |
| From a shade tree engineer viewpoint it totally escapes me how these can stop the idle air from getting plugged. |
Yep. A lot of effort for almost nothing. Extending the whole carb vent UP like normal does a lot more. we should call that the carb doctor  |
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scotth17
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Joined: January 30, 2012
Posts: 335
Location: Bedford Texas
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| Posted: Mon Feb 16, 2015 8:13 pm Post subject: |
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| For the cheapest of cheap VW bastards out there, you can cut a strip of pantyhose material and stretch it across the vent before installing the air cleaner base and it will keep the big chunks out.... |
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croSSeduP
Samba Member
Joined: June 13, 2004
Posts: 1106
Location: Western Washington State
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| Posted: Mon Feb 16, 2015 9:00 pm Post subject: |
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| scotth17 wrote: |
| For the cheapest of cheap VW bastards out there, you can cut a strip of pantyhose material and stretch it across the vent before installing the air cleaner base and it will keep the big chunks out.... |
Man. That IS cheap. How do you know the pantyhose won't cause an air restriction in the idle air circuit and it not meter properly because there isn't enough air?
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mark tucker
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Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Mon Feb 16, 2015 9:06 pm Post subject: |
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| in 12 years of idf style crabs I have had 2 cloged idle jets. you might want to find the place crap is getten in. under the airfilters?under the filter bases, through the filter,etc.Ive always run the outer wears over my filters.my car is a baja style in the rear with everything hanging out there in the breezzee. Ive seen many k&n filters turned to junk by the owners/mechanic and the velostity stacks.I reform my stacks so they do not come into contact with the filters.I also have gaskets under the stacks so i can sync them better. |
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Bajaman65
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Joined: January 16, 2007
Posts: 469
Location: Borrego Springs
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| Posted: Mon Feb 16, 2015 11:39 pm Post subject: |
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This is a very common problem and an easy fix, use the Jet Doctors - or listen to the none believers and sputter down the road, it's just cheap insurance but some people have to argue every post  |
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old DKP driver
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Joined: March 30, 2005
Posts: 4145
Location: Los Gatos,Ca.
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| Posted: Fri May 29, 2015 1:38 pm Post subject: jet doctor |
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Question on re-tuning after installing the CB Performance jet doctors
on weber 40 idf's.
Since now the idle circuit has longer vent tubes is it now in need of larger idle jets?
My problem: when first starting my bus now is hard starting that I never had
before installing these
Thanks' in advance 
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earthquake
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Joined: January 10, 2008
Posts: 3984
Location: SANDY VALLEY, NEVADA
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| Posted: Fri May 29, 2015 2:52 pm Post subject: |
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| britegreenVWSB wrote: |
| scotth17 wrote: |
| For the cheapest of cheap VW bastards out there, you can cut a strip of pantyhose material and stretch it across the vent before installing the air cleaner base and it will keep the big chunks out.... |
Man. That IS cheap. How do you know the pantyhose won't cause an air restriction in the idle air circuit and it not meter properly because there isn't enough air? |
It depends on where you get the pantyhose, I went to Amargosa dunes here in NV with a buddy and his Dad once, Well they forgot the Outer-filters for the Webers so my buddies dad went down the Cat-house about 10 miles away.
He had to pay 20$ for a pair but he got to take them off, He was gone for 3 hours too.
Casey
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hill
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Joined: September 24, 2011
Posts: 442
Location: PNW
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| Posted: Mon Aug 03, 2015 5:52 am Post subject: |
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| earthquake wrote: |
It depends on where you get the pantyhose, I went to Amargosa dunes here in NV with a buddy and his Dad once, Well they forgot the Outer-filters for the Webers so my buddies dad went down the Cat-house about 10 miles away.
He had to pay 20$ for a pair but he got to take them off, He was gone for 3 hours too.
Casey |
Lota traffic on the road that day, eh?
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jbbugs
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Joined: September 16, 2002
Posts: 2152
Location: Behind the wheel
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| Posted: Mon Aug 03, 2015 6:31 pm Post subject: |
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I have had great luck keeping my idle jets clear be just taking a big finger full of bearing grease and smearing Thick on the rubber base of my air cleaners before installing them on their bases.
Zero clogged idle jets.
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Bajaman65
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Joined: January 16, 2007
Posts: 469
Location: Borrego Springs
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| Posted: Tue Aug 04, 2015 10:31 pm Post subject: |
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| jbbugs wrote: |
I have had great luck keeping my idle jets clear be just taking a big finger full of bearing grease and smearing Thick on the rubber base of my air cleaners before installing them on their bases.
Zero clogged idle jets. |
And have you done a lot of Off Road ? I am sure your grease works great for you but about 90% of off road people will have an idle jet plugging problem at one time or another. This is just a simple solution to a very common problem. I do not understand why some many people want to argue everything |
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jbbugs
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Joined: September 16, 2002
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Location: Behind the wheel
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| Posted: Wed Aug 05, 2015 4:27 am Post subject: |
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I'm Not arguing anything. Just stating what works well for me. I run an open engine compartment on my roadrace bug, where it sees plenty of dirt/ debris during 24-hour long races. I've also installed a few sets of Jet Doctors on a Few customers cars. They seem to work too. I haven't tried them on my racecar, as I haven't had a need for them.
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Last edited by jbbugs on Thu Aug 06, 2015 11:35 am; edited 1 time in total |
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Greezy Joe
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Joined: April 12, 2010
Posts: 1534
Location: Crawfordville, Fl
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| Posted: Wed Aug 05, 2015 7:01 am Post subject: |
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I quess I'm one of them cheap VW Guys, black panty knee high stockings over the air filters, never a plugged jet. Now this is on a cheapie $7,000 stroker. 
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Oil Phil-M
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Joined: October 08, 2005
Posts: 541
Location: Vancouver, BC
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| Posted: Thu Aug 06, 2015 11:10 am Post subject: |
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| At the same time I got the Doctors I replaced the cheap stamped flexy chrome air filter housings with CB's alloy units and started using a thin layer of wheel bearing grease on the top and bottom of the filter edge where in makes contact with the filter housing. So i cant say which had the biggest effect but clogged idles are a rare occurrence now. |
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