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mikelars
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Joined: February 27, 2019
Posts: 238
Location: North Carolina
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virusdoc
Samba Member
Joined: August 13, 2018
Posts: 525
Location: Durham, NC, USA
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 Posted: Mon Nov 29, 2021 9:25 am Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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If your needle valve seats and spring are in good shape, 3 psi should be fine. Hope this fixes your leak!
_________________
1976 Convertible Super Beetle, "June Bug".
FI-->34PICT3 carb conversion-->now dual 40 IDFs
Self-rebuilt 1904 (after totally botching a 1641 rebuild, cussing a lot, and throwing lots of cash in the fire) |
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mikelars
Samba Member
Joined: February 27, 2019
Posts: 238
Location: North Carolina
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| Posted: Tue Nov 30, 2021 3:24 pm Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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My alternator style fuel pump had some strange variability - initially when cold, it seemed to have high fuel pressure - close to 6 psi. Then after I put gaskets on there and trimmed the push rod, I got it just under 3. And then I drove it, and it dropped to 1.5, and then after a longer drive it dropped below 1.
So while I thought I had it resolved, this variability indicated it was not.
So then I determined I had to sacrifice my generator rod (108mm) because I had ground too much off the 100mm one. So I made the 108mm rod about 4mm longer than the ground down 100mm one, and put it on with 2 additional gaskets. This pressure started close to 3 and went down under 2 again after running for a while. So I then took off all the “extra” gaskets and it seems pretty steady just over 3 psi and not dropping.
Sheesh - this little pump was so variable - it seems you have to aim high - especially if the engine is cold - and then target where it stabilizes…
Is there a procedure that experienced people do for this - like fully warm up the motor and then use gaskets to get to 3 - or something like that?
_________________
Here is my 1961 Beetle Restoration:
https://www.youtube.com/playlist?list=PLW_2wBCs4Ny2qXEPvdnfvEzN42T8JA8zO
Here is my 1966 Split Bus - Restoration Channel:
https://youtube.com/channel/UCPBRysmvrJlif2wzwEwiuwQ
2332 Torque Motor Build
https://youtube.com/playlist?list=PLW_2wBCs4Ny2HwsKM9QT4LFpcSqP3QG0p
Engine Rebuild 1968cc Playlist:
https://youtube.com/playlist?list=PLW_2wBCs4Ny1JbZ2EgJQQ2awfo0koZRqz |
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sled
Samba Member
Joined: February 16, 2005
Posts: 6179
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| Posted: Tue Nov 30, 2021 3:33 pm Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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I just always use high quality electric fuel pumps. proper pressure, and no sacrificing volume. couple of wires to hook up, done!
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drive your split. |
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APPLEGREENVW
Samba Member
Joined: November 30, 2003
Posts: 2388
Location: Seekonk,Massachusetts USA
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| Posted: Tue Nov 30, 2021 4:14 pm Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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| sled wrote: |
| I just always use high quality electric fuel pumps. proper pressure, and no sacrificing volume. couple of wires to hook up, done! |
He doesn't want to hear that. He want his fuel pump pushrod to fix the problem.
_________________
Parts for sale https://www.thesamba.com/vw/classifieds/search.php?username=APPLEGREENVW
02/76 Beetle sedan |
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mikelars
Samba Member
Joined: February 27, 2019
Posts: 238
Location: North Carolina
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74 Thing
Samba Member
Joined: September 02, 2004
Posts: 7394
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| Posted: Tue Nov 30, 2021 5:22 pm Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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| I bet it is the inaccuracy of the gauge. |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26790
Location: Colorado Springs
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| Posted: Tue Nov 30, 2021 5:35 pm Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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That appears to be a sealed pressure gauge.
See the problem? SEALED pressure gauge? think about it.
You need to "burp" the pressure gauge if it has a rubber plug, or keep it at a constant temperature, or get a gauge that isn't sealed, or drill a hole in it. |
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mikelars
Samba Member
Joined: February 27, 2019
Posts: 238
Location: North Carolina
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74 Thing
Samba Member
Joined: September 02, 2004
Posts: 7394
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| Posted: Tue Nov 30, 2021 7:46 pm Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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| modok wrote: |
That appears to be a sealed pressure gauge.
See the problem? SEALED pressure gauge? think about it.
You need to "burp" the pressure gauge if it has a rubber plug, or keep it at a constant temperature, or get a gauge that isn't sealed, or drill a hole in it. |
I mentioned that earlier as well.
Pull the rubber plug on the back and burb it when it is warm. It should not be reading all over the place. You would have been better off teeing in a vac/pressure gauge that you can get at your local auto supply and then set the pressure then remove the gauge. |
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mikelars
Samba Member
Joined: February 27, 2019
Posts: 238
Location: North Carolina
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| Posted: Tue Nov 30, 2021 7:52 pm Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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| 74 Thing wrote: |
| modok wrote: |
That appears to be a sealed pressure gauge.
See the problem? SEALED pressure gauge? think about it.
You need to "burp" the pressure gauge if it has a rubber plug, or keep it at a constant temperature, or get a gauge that isn't sealed, or drill a hole in it. |
I mentioned that earlier as well.
Pull the rubber plug on the back and burb it when it is warm. It should not be reading all over the place. You would have been better off teeing in a vac/pressure gauge that you can get at your local auto supply and then set the pressure then remove the gauge. |
Ok - I mean I have a Tee fitting and can put in any gauge - I just bought that one without knowing any better. But if I can just use it to confirm it is working properly - I’ll just ditch the gauge and fitting with confidence the fuel pressure is good…
_________________
Here is my 1961 Beetle Restoration:
https://www.youtube.com/playlist?list=PLW_2wBCs4Ny2qXEPvdnfvEzN42T8JA8zO
Here is my 1966 Split Bus - Restoration Channel:
https://youtube.com/channel/UCPBRysmvrJlif2wzwEwiuwQ
2332 Torque Motor Build
https://youtube.com/playlist?list=PLW_2wBCs4Ny2HwsKM9QT4LFpcSqP3QG0p
Engine Rebuild 1968cc Playlist:
https://youtube.com/playlist?list=PLW_2wBCs4Ny1JbZ2EgJQQ2awfo0koZRqz |
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mikelars
Samba Member
Joined: February 27, 2019
Posts: 238
Location: North Carolina
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| Posted: Wed Dec 01, 2021 8:13 am Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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| 74 Thing wrote: |
| modok wrote: |
That appears to be a sealed pressure gauge.
See the problem? SEALED pressure gauge? think about it.
You need to "burp" the pressure gauge if it has a rubber plug, or keep it at a constant temperature, or get a gauge that isn't sealed, or drill a hole in it. |
I mentioned that earlier as well.
Pull the rubber plug on the back and burb it when it is warm. It should not be reading all over the place. You would have been better off teeing in a vac/pressure gauge that you can get at your local auto supply and then set the pressure then remove the gauge. |
ok - you are totally right - basically the plug allows the inside of the gauge to be not atmospheric pressure and make she gauge reading inaccurate. I basically have to burp the gauge every single time - but then it is actually accurate.
Thanks for the info - first fuel pressure gauge I ever bought.
The pump is now stable at 3.25 psi - so I am happy and will remove that burp gauge soon...
_________________
Here is my 1961 Beetle Restoration:
https://www.youtube.com/playlist?list=PLW_2wBCs4Ny2qXEPvdnfvEzN42T8JA8zO
Here is my 1966 Split Bus - Restoration Channel:
https://youtube.com/channel/UCPBRysmvrJlif2wzwEwiuwQ
2332 Torque Motor Build
https://youtube.com/playlist?list=PLW_2wBCs4Ny2HwsKM9QT4LFpcSqP3QG0p
Engine Rebuild 1968cc Playlist:
https://youtube.com/playlist?list=PLW_2wBCs4Ny1JbZ2EgJQQ2awfo0koZRqz |
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virusdoc
Samba Member
Joined: August 13, 2018
Posts: 525
Location: Durham, NC, USA
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| Posted: Wed Dec 01, 2021 8:14 am Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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| mikelars wrote: |
| 74 Thing wrote: |
| modok wrote: |
That appears to be a sealed pressure gauge.
See the problem? SEALED pressure gauge? think about it.
You need to "burp" the pressure gauge if it has a rubber plug, or keep it at a constant temperature, or get a gauge that isn't sealed, or drill a hole in it. |
I mentioned that earlier as well.
Pull the rubber plug on the back and burb it when it is warm. It should not be reading all over the place. You would have been better off teeing in a vac/pressure gauge that you can get at your local auto supply and then set the pressure then remove the gauge. |
ok - you are totally right - basically the plug allows the inside of the gauge to be not atmospheric pressure and make she gauge reading inaccurate. I basically have to burp the gauge every single time - but then it is actually accurate.
Thanks for the info - first fuel pressure gauge I ever bought.
The pump is now stable at 3.25 psi - so I am happy and will remove that burp gauge soon... |
That's a fine pressure. More importantly, did your fuel leak get solved?
_________________
1976 Convertible Super Beetle, "June Bug".
FI-->34PICT3 carb conversion-->now dual 40 IDFs
Self-rebuilt 1904 (after totally botching a 1641 rebuild, cussing a lot, and throwing lots of cash in the fire) |
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mikelars
Samba Member
Joined: February 27, 2019
Posts: 238
Location: North Carolina
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| Posted: Wed Dec 01, 2021 8:21 am Post subject: Re: Weber IDF - intermittent fuel leakage from both center/sides |
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| virusdoc wrote: |
| mikelars wrote: |
| 74 Thing wrote: |
| modok wrote: |
That appears to be a sealed pressure gauge.
See the problem? SEALED pressure gauge? think about it.
You need to "burp" the pressure gauge if it has a rubber plug, or keep it at a constant temperature, or get a gauge that isn't sealed, or drill a hole in it. |
I mentioned that earlier as well.
Pull the rubber plug on the back and burb it when it is warm. It should not be reading all over the place. You would have been better off teeing in a vac/pressure gauge that you can get at your local auto supply and then set the pressure then remove the gauge. |
ok - you are totally right - basically the plug allows the inside of the gauge to be not atmospheric pressure and make she gauge reading inaccurate. I basically have to burp the gauge every single time - but then it is actually accurate.
Thanks for the info - first fuel pressure gauge I ever bought.
The pump is now stable at 3.25 psi - so I am happy and will remove that burp gauge soon... |
That's a fine pressure. More importantly, did your fuel leak get solved? |
no leaks yet - it has only been about a day or two since the fix went in. I am pretty sure this will fix it, because the weber accelerator pump area holds fine normally, and only rarely would something come out - and the pressure was clearly too high before the fix.
Next problem to tackle is putting one of these between my fuel sender and fuel gauge - this one I am very curious about, because it is hard to get an accurate setup with a bay tank in a split bus - the ohms just don't seem to quite match up - and the bay gauges need a split bus bezel to fit the dash.
https://www.tanksinc.com/index.cfm/page/ptype=prod...rUEALw_wcB
_________________
Here is my 1961 Beetle Restoration:
https://www.youtube.com/playlist?list=PLW_2wBCs4Ny2qXEPvdnfvEzN42T8JA8zO
Here is my 1966 Split Bus - Restoration Channel:
https://youtube.com/channel/UCPBRysmvrJlif2wzwEwiuwQ
2332 Torque Motor Build
https://youtube.com/playlist?list=PLW_2wBCs4Ny2HwsKM9QT4LFpcSqP3QG0p
Engine Rebuild 1968cc Playlist:
https://youtube.com/playlist?list=PLW_2wBCs4Ny1JbZ2EgJQQ2awfo0koZRqz |
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