 carbs are dripping, is this normal? |
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| adammtb |
 Dec 25 2005, 09:19 AM
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#1
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Member  Group: Members Posts: 68 Joined: 24-September 05 From: Asheville, NC Member No.: 4,856  |
So we're running Weber 34 ICTs. We just got all the fuel lines hooked up and turned the fuel pump on. Fuel drips out of a little port near within a concentric ring inside just above the butterfly valve. Is this the idle fuel? When we goose the throttle some additional fuel is squirted in via another tube - I take it this is the accel fuel. We have a Facet fuel pump also.
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Replies(1 - 12)
| JoeSharp |
Dec 25 2005, 09:55 AM
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#2
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In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
How much fuel pressure do you have and is there any kind of seal there. Should not leak.
:PERMAGRIN: Joe |
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| adammtb |
Dec 26 2005, 04:02 AM
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#3
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Member Group: Members Posts: 68 Joined: 24-September 05 From: Asheville, NC Member No.: 4,856 |
4-7 psi
I don't think there is supposed to be a seal. The fuel exits a little port which is positioned within the airstream. |
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| McMark |
Dec 26 2005, 05:23 AM
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#4
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
You should never see drips. Especially from anywhere besides the accelerator jet.
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| JoeSharp |
Dec 26 2005, 07:29 AM
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#5
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In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
Can you get the fuel pressure down to 4?
:PERMAGRIN: Joe |
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| Cap'n Krusty |
Dec 26 2005, 09:25 AM
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#6
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
I'm a bit confused here. If it's doing that when it's running, you may have percolation because the mixture's too lean. If it does it all the time, you have a float or needle/seat problem. The Cap'n
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| lapuwali |
Dec 26 2005, 10:46 AM
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#7
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
4-7 psi is way too high for a Weber. Get a regulator and trim it down to 3 psi. Weber needle valves don't like much fuel pressure.
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| maf914 |
Dec 27 2005, 10:01 AM
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#8
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Not a Guru! Group: Members Posts: 3,049 Joined: 30-April 03 From: Central Florida Member No.: 632 Region Association: None 
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One of my Webber 40 IDF carbs once developed a fuel dribble which resulted in rough running. I found that the float level was not in correct adjustment. Resetting the float level solved the problem. Just an idea.
Don't know if this applies to an ICT carb, though. (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif) |
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| 1bad914 |
Dec 27 2005, 10:07 AM
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#9
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Senior Member Group: Members Posts: 618 Joined: 6-May 04 From: Battle Creek, MI Member No.: 2,028 |
Adjust your floats and get the fuel pressure down to 4 psi. The floats are rarely adjusted correctly, even from the factory.
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| olav |
Dec 27 2005, 10:22 AM
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#10
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Senior Member Group: Retired Members Posts: 1,107 Joined: 28-December 02 From: Los Gatos, CA. USA Member No.: 34 Region Association: None |
I had a stuck/sticking needle valve. Replaced it and all was well. |
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| goberserk |
Dec 29 2005, 10:28 AM
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#11
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Newbie Group: Members Posts: 23 Joined: 26-November 05 From: Columbia, MD Member No.: 5,193 |
Thanks guys. It happens when I turn the key to the "on" position. The car doesn't have to be running. And it only happens some times, not all the time. I'll try tracking down a regulator, any brand suggestions? A quick look at summitracing.com resulted in a bunch in the 3-4 psi range.
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| rhodyguy |
Dec 29 2005, 10:42 AM
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#12
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,084 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
or check out the quiet rotary pumps, with the proper fp, from cbperformance. pump, regulator, gauge...too much.
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| JoeSharp |
Dec 29 2005, 11:24 AM
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#13
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In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
Kevin is right. I used the facett and with the regulator it cost more than the CB. and it supplies the correct pressure.
:PERMAGRIN: Joe |
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