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dawerks Samba Member
Joined: September 15, 2010 Posts: 2349
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Posted: Tue Apr 24, 2018 6:57 am Post subject: 28 PCI will not squirt... |
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I cleaned up 2 of them, and neither of them 'squirt'. Later carbs have a nice curved tube that you can easily see the stream of gas when you pump the accel. shaft.
The accel. pump looks simple and in good shape, what port should the gas squirt out from? (From the fuel Nozzle I assume, is there a way to check the tiny ball bearings?)
_________________ "There is only one sin; disconnection from self." |
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fl59bug Samba Member
Joined: November 23, 2005 Posts: 1976 Location: North Carolina
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Posted: Tue Apr 24, 2018 7:19 am Post subject: Re: 28 PCI will not squirt... |
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Fuel should squirt from the tip of the fuel nozzle, which is shown in the diagram. In the diagram it shows an air correction jet in the fuel nozzle. My 28 pci does not have that.
I rebuilt my carb and had basically the same problem. I believe one or both of the small bb's are rusted in, but hoping that with time and repeated runs of the engine (it's on the floor in my garage mounted to a spare transaxle) it will free them up and begin to squirt.
Even with the stuck bb's, with the carb installed on the engine there is enough vacuum at idle and low - medium rpms for gas to get sucked in from the emulsion tube sprayers to compensate. If anything you'll notice poor acceleration but the car should still idle and run assuming no other problems in the carb.
I think some people with this problem have been able to either disassemble their carb and free up the bb's or they used compressed air. |
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dawerks Samba Member
Joined: September 15, 2010 Posts: 2349
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Posted: Tue Apr 24, 2018 8:52 am Post subject: Re: 28 PCI will not squirt... |
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If it runs, I can use the 'one hand carb rebuild' on it.
..when the car runs, take off air filter, and then give it a bit of gas, and cover the inlet with your hand. It will try to choke off and die, but give it more gas. It uses the vacuum of the engine to suck out all the passages...
Is there any other way to unstuck those BB's? _________________ "There is only one sin; disconnection from self." |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24671 Location: Olympia Wash Rinse & Repeat
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Posted: Tue Apr 24, 2018 3:11 pm Post subject: Re: 28 PCI will not squirt... |
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dawerks wrote: |
Is there any other way to unstuck those BB's? |
Have had that happen with later carbs and could just reach into the areas with vintage dental tools to pop the BB loose. Maybe soaking that passage with vinegar at least over night would loosen up any corrosion in there. _________________ In Stereo, Where Available! |
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Zwitterkafer Samba Member
Joined: November 17, 2007 Posts: 875 Location: Lanark County, Ontario, Canada
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Posted: Tue Apr 24, 2018 3:40 pm Post subject: Re: 28 PCI will not squirt... |
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Only the earliest (Zwitter) bb's were steel, and could rust, which caused problems. The later ones were brass, so a good cleaning with solvent should free them up. Even better...remove the balls and clean the passage properly. _________________ "Criticism comes easier than Craftsmanship"
- Zeuxius, 400 BC |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24671 Location: Olympia Wash Rinse & Repeat
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Posted: Tue Apr 24, 2018 3:46 pm Post subject: Re: 28 PCI will not squirt... |
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Zwitterkafer wrote: |
Only the earliest (Zwitter) bb's were steel, and could rust, which caused problems. The later ones were brass, so a good cleaning with solvent should free them up. Even better...remove the balls and clean the passage properly. |
Like said before, have had same corrosion problem with later carbs. The BBs themselves do not corrode up, but the carb passage does trapping the BBs. Tried multiple times to loosen up with solvent with no luck. _________________ In Stereo, Where Available! |
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sunroof Samba Member
Joined: October 06, 2006 Posts: 1747 Location: Winnipeg
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Posted: Wed Apr 25, 2018 10:14 am Post subject: Re: 28 PCI will not squirt... |
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Likely a ball stuck in the tube. What has worked for me in the past: There is a brass tube that is a little proud of the carb body, it holds the balls in place. You can work the tube out with a pair of pliers. VERY carefully turn the tube back and forth while pulling on it, It should come out. There are 2 balls as per the diagram, a larger one on top and a smaller one below. With solvent and sharp tools you should be able to work them out. Clean everything and reassemble. If you hold a finger over the tube and pump the accelerator pump it should push a little air against your finger. Make sure all the passages are open and reassemble carb. Good luck.
Don _________________ Better and better mistakes! |
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dawerks Samba Member
Joined: September 15, 2010 Posts: 2349
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Posted: Wed Apr 25, 2018 11:26 am Post subject: Re: 28 PCI will not squirt... |
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Other than removing that tinnny tube in the accel. housing, there is no other way the ball bearings could fall out right?
Ie, there's no screws I can undo that would remove them? Reason I'm asking is if they accidentally can fall out (seems like a solid no, just making sure). _________________ "There is only one sin; disconnection from self." |
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dawerks Samba Member
Joined: September 15, 2010 Posts: 2349
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Posted: Wed Apr 25, 2018 10:26 pm Post subject: Re: 28 PCI will not squirt... |
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Update; She runs! I love these little 36HP engines. It ran by itself long enough to give it the 'gloved hand carb rebuild' on the fly and it must've got unstuck as it suddenly ran great. _________________ "There is only one sin; disconnection from self." |
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fl59bug Samba Member
Joined: November 23, 2005 Posts: 1976 Location: North Carolina
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Posted: Thu Apr 26, 2018 6:46 am Post subject: Re: 28 PCI will not squirt... |
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Awesome, good to hear Its amazing what a little running time can do on these old engines to free stuff up. |
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sunroof Samba Member
Joined: October 06, 2006 Posts: 1747 Location: Winnipeg
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Posted: Thu Apr 26, 2018 8:32 am Post subject: Re: 28 PCI will not squirt... |
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Good to hear!
Don _________________ Better and better mistakes! |
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Strato56 Samba Member
Joined: April 08, 2002 Posts: 265 Location: Portland, OR
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Posted: Thu May 24, 2018 3:11 pm Post subject: Re: 28 PCI will not squirt... |
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I've had problems off and on with mine and just experienced another one... Was driving home from work a few weeks ago and car started sputtering and running really poor. Would do this when it was under a load (uphill) or on initially pushing the gas pedal after coming down a hill. Finally died completely on me and would only start if I did not step on the gas pedal when turning engine over and would run and drive only if I stepped on the gas as lightly as possible.
Checked the accelerator pump and fuel came out, but didn't seem to be enough, so pulled the check balls, cleaned them up, ran some cleaner though the system and it seems better, but there is no stream or giant spray of gas when the car is off and you push the throttle linkage...
How much of a "spray" should there be when the car is off? Should gas shoot out the top of the carb? If so, I got a diaphragm problem or something cause I don't get a spray out the top...
Thanks. |
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dawerks Samba Member
Joined: September 15, 2010 Posts: 2349
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Posted: Thu May 24, 2018 5:04 pm Post subject: Re: 28 PCI will not squirt... |
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That's the same issue I had. Later carbs SPRAY a nice visible and audible amount.
This carb it seems to dribble?? But don't take my word for it, mine is messed up. It runs fine, but it def. doesn't 'squirt'. _________________ "There is only one sin; disconnection from self." |
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EverettB Administrator
Joined: April 11, 2000 Posts: 69734 Location: Phoenix Metro
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Posted: Thu May 24, 2018 5:31 pm Post subject: Re: 28 PCI will not squirt... |
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My '55 one doesn't squirt a stream like you see on a later carb but it definitely comes out the top of the carb. if the air cleaner is off.
It's more like a little spritz of fuel that sort of sprays everywhere.
If the car is running is immediately gets sucked down the throat. _________________ How to Post Photos
Everett Barnes - [email protected] | My wanted ads
"Water is the only drink for a wise man" | "Communication prevents complaints"
Stop dead photo links! Post your photos to The Samba Gallery! |
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Snort Samba Member
Joined: April 02, 2005 Posts: 1957 Location: Seattle, WA
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Posted: Thu May 24, 2018 5:36 pm Post subject: Re: 28 PCI will not squirt... |
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Look at the diagram and you can see how it was designed to flow out into a small air jet rather than a spray tube. It is rather unrewarding when the motor is not running watching it bubble out of the tube but the air jet seems to make it all work just as well as the later carbs. Maybe it has the advantage of being less susceptible to plugging by small dirt particles. |
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sunroof Samba Member
Joined: October 06, 2006 Posts: 1747 Location: Winnipeg
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Posted: Fri May 25, 2018 7:54 am Post subject: Re: 28 PCI will not squirt... |
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Strato56: it sounds like you have a plugged main jet. Try unbolting it from the side of the carb and cleaning it out.
Don _________________ Better and better mistakes! |
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Strato56 Samba Member
Joined: April 08, 2002 Posts: 265 Location: Portland, OR
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Posted: Fri May 25, 2018 1:11 pm Post subject: Re: 28 PCI will not squirt... |
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sunroof wrote: |
Strato56: it sounds like you have a plugged main jet. Try unbolting it from the side of the carb and cleaning it out.
Don |
I'll give it a shot, can't hurt. I'm super shocked I have any blockages at all as I rebuilt the carb, fuel pump, relined the gas tank, etc. 2 years ago. I think it's just that it sits during the winter and gets started up, but never driven? I don't know, been an off and on problem for years for me... |
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TDCTDI Samba Advocatus Diaboli
Joined: August 31, 2013 Posts: 12816 Location: North Carolina
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Posted: Fri May 25, 2018 3:01 pm Post subject: Re: 28 PCI will not squirt... |
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The best way that I have found to clean & remove the check valve balls is to get a 3"-4" piece of wire from an old harness that just fits the passage, strip about 1/8" of the insulation off the end & turn the wire into a sort of brush. Push it into the passage & gently twist it, the wire strands clean the corrosion & most of the time, they'll actually grab the ball & pull it up when you remove the wire. _________________ Everybody born before 1975 has a story, good, bad, or indifferent, about a VW.
GOFUNDYOURSELF, quit asking everyone to do it for you!
An air cooled VW will make you a hoarder.
Do something, anything, to your project every day, and you will eventually complete it. |
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1958kafer Samba Member
Joined: January 25, 2015 Posts: 16 Location: South Australia
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Posted: Fri Sep 25, 2020 6:06 pm Post subject: Re: 28 PCI will not squirt... |
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My fuel in coming out of the float chamber ventilation tube. Lots of black smoke and running terrible. Any ideas? |
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VW_Jimbo Samba Member
Joined: May 22, 2016 Posts: 9880 Location: Huntington Beach, CA
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Posted: Fri Sep 25, 2020 6:41 pm Post subject: Re: 28 PCI will not squirt... |
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1958kafer wrote: |
My fuel in coming out of the float chamber ventilation tube. Lots of black smoke and running terrible. Any ideas? |
Float is sunk (full of fuel), needle valve no longer seating, crap stuck in that valve or too much fuel from the pump. _________________ Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
TDCTDI wrote: |
Basically, a whole bunch of fuckery to achieve a look. |
67rustavenger wrote: |
GFY's Xevin and VW_Jimbo! |
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