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Weber - black tailpipe


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Three things I found, that together, solves this issue.

 

The Weber carburetor, somehow lets the engine to inhale an increased flow of Gasoline + Air, some of the Mixture doesn't get well burned at the Combustion Chambers; what I did to aid with that, was:

 

  • to substitute the Regular ignition coil from the Distributor, with an USA made "Accel SuperStock" 8140 known as the High Vibrations Coil, because it is Epoxy filled, instead of oil; the Accel ignition coil provides around twice the power output, while keeping the Resistance value close to the Stock values, so it will not burn the ignition Module.
  • The other thing that helps, is to delete both Catalytic converters,
  • and disconnect the EGR.

 

Kind Regards.

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when i tuned my weber i did not do it by the seat of my pants.  I hooked a Wideband O2 sensor into the exhaust and fine tuned it.  At idle you want around 14:7 or so and at full throttle you want 13:0-13:2 or so.  I found with my setup it wanted to be a bit leaner at idle and that it wanted more fuel at full throttle.  I upped the secondary jets to get my full throttle mixture just right and then i was done.  As for soot...i think there was black in the tail pipe with my weber too but not a lot.  I think there was more with the factory carter-weber or the hitachi lol.  

Edited by hatchsub
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Don't go around telling folks to de-cat their cars ... Be a responsible steward of our global environment.

 

Yes, Sorry... I forgot that you need to have Catalytic Converters in USA by Law.

 

Here in Honduras, those are not required, so is impossible to find a New one, only the clogged ones at Junk Yards from cars that comes cut or crashed from the USA ... so we have to Delete catalytics to prevent engine damage, because catalytics gets clogged easy with our pathetic Gasolines... 

 

You know, the Downsides of living in a developing country... 

 

I care the Environment very much, I do many things, from recycling the used oils, to plant big trees, which is my personal favourite environmental activity. Already I have a small city entrance, full of Trees at both sides of the Road, where I planted them in year 1992... 

 

Sorry for the offtopic post... Kind Regards.

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'86 GL

 

Anyone running a Weber have a clean tailpipe?  Mines always sooty.  Everything is tuned correctly and jets are what they are supposed to be.

 

Thought I would inquire.....

 

All the ea82s I've known have burned a little oil, especially once they get a few miles on them.  Considering that it runs as it should and your plugs look correct, I would be more inclined to attribute the soot to trace build-up of burned oil.  

 

Weber tuning can be a little touchy, but it sounds like the only way you are going to improve your tune over it's current state is with a wideband O2 sensor as hatchsub mentioned.

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when i tuned my weber i did not do it by the seat of my pants.  I hooked a Wideband O2 sensor into the exhaust and fine tuned it.  At idle you want around 14:7 or so and at full throttle you want 13:0-13:2 or so.  I found with my setup it wanted to be a bit leaner at idle and that it wanted more fuel at full throttle.  I upped the secondary jets to get my full throttle mixture just right and then i was done.  As for soot...i think there was black in the tail pipe with my weber too but not a lot.  I think there was more with the factory carter-weber or the hitachi lol.  

Can you tell us how you hooked a wideband O2 sensor, How do you power it (I believe wideband O2 sensors have a heater)? How do you read it?  I think at the basic they are Zirconium dioxide devices which produce a millivolt output dependent on the O2 concentration.

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Its been awhile but basically i bought a Innovate LC1 wideband gauge and O2 sensor combo.  I welded a bung in the exhaust y where both banks of cylinders come together.  I then followed the instructions on hooking the gauge up.  If memory serves the gauge only needs power and ground to work correctly.  I think i just tapped into my power wire from the radio to be honest.  Their directions are pretty good as to how to hook them up.  I made sure to hook it up temporarily however as all i wanted to do was tune the carb and pull it off.  It was bought for my camaro really and is installed permanently in that.  

 

What i bought:

http://www.ebay.com/itm/Innovate-LC1-Wideband-O2-DB-52mm-Kit-RED-Gauge-Display-LC-1-Tuner-Combo-/400886192669?hash=item5d56adda1d:g:gY0AAOxy4XNSRGA3&vxp=mtr

 

Instructions for install:

http://www.lxforums.com/board/showthread.php/111557-How-to-properly-install-an-Innovate-Motorsport-LC-1-Wideband

 

There is also a PDF direction from Innovate that i would read first. 

Edited by hatchsub
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