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Unread 01-12-2009, 06:12 PM   #1
vking76
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1972 CJ5 
 
Join Date: Jan 2009
Location: portland, or
Posts: 1
More questions about weber carb problems... runs rich all the time

Hi there, I found this site when searching for answers with my 72 jeep cj5 ... I have read a few posts about the weber carb conversion (which I have paid to have "installed" on my jeep ...

As with what I have read from other posts, it seems the mechanics have no idea how to resolve the problems ... I have tried having the timing adjusted, I have a fuel pressure regulator and it is turned down to 1 ... I have not yet re-jetted or anything as I do not even know if the mechanic hooked it up right in the first place.

I love this jeep, but its been sitting a long time now waiting on repairs.

It always runs rich ... even under acceleration. It has the webber carb with auto choke. Its running gear and powerplant are basically all stock. This rig has only 72K original miles still with original paint... the old carb was leaking everywhere ... i suppose bad gaskets from sitting so much (it does sit in an indoor storage area) I wanted to get it up and running this summer and took it to have the carb rebuilt.

Mechanic had the jeep all summer and when I finally complained enough about not having my vehicle, it was returned unfinished. By unfinished, I mean there is one hose coming from the air filter that runs over the top of everything to the front of the jeep and just ends ... not hooked to anything. Besides that, it runs so rich that you cant breath within 30 seconds of starting it (almost litterally).

Even under throttle, it does the same. I am trying to figure out what the next steps are to fix this thing ... any help would be greatly appreciated.

I have pictures of the carb and hoses, fuel regulator, etc ... I will happily share. Although mechanically inclined, I work construction, not automotive. I love the jeep, its been in the family from when it was 2 years old. I am not a jeep guy that knows every part nuber or whatever ... most of the engine info i got from the web, not because I knew it off hand.

I say this because I would like to give you all the information possible, but I really dont know it. The best I can do is give pictures.

I really appreciate any ideas. Or if you know a shop that knows what they are doing around portland, oregon, that would be good as well. Im really stumped here.

thanks again

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Unread 01-12-2009, 06:48 PM   #2
Fjguercio
Web Wheeler
1978 CJ7 
 
Join Date: Dec 2007
Location: Burnsville, MN
Posts: 2,814
Welcom sorry your weber and CJ is running rich. Do you have the Weber 34 or 32/36?? They run similar but the jet changes will be different part numbers.

The weber will put more fuel into the 258 and that is how they preform better per the weber resellers web sites. So... after you get closer always good to upgrade the ignition so you light/burn the extra fuel. You will read this in some of the resellers web sites.

Here is what I did to rejet the weber and some good tune steps. I have found the jets are TOO BIG for the 258.
http://www.jeepforum.com/forum/f8/weber-34-dgec-carb-too-rich-jets-tune-jeep-4-2-258-a-631105/



You can post your pics to Photobucket.com and put the links here and we can post them for you.

JeepHammer has done some nice stuff for the ignition upgrades.
http://www.junkyardgenius.com/igntio...eicompair.html

I think you can put a 1978 distributor FordMotorCraft DuarSpark style and use the Summit Digital Multispark Ignition on sale now $115, distributor $50, new wires to fit Napa Belden Royal Blue for '94 4.0 $30, Used Ford E Coil, Mtd, Connector with pigtail & ALSO take a connectro and pigtail to mate to distributor $4. If this works out this will max out your ignition, all new wires, easy to install all new or rebuilt for $$200.00 Add a ground to your head. Look up grounds and add other ground wires to your CJ.
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Unread 01-12-2009, 08:24 PM   #3
keith460
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1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 5,039
Assuming you have the Weber 32/36 DGEV carb, is it correctly plumbed for fuel lines, both supply and return?

Example:


How about the proper routing of vacuum lines from the carb?

Example:


There is also a few websites that will help in tuning your carb and one in particular comes to mind and can be found here: http://www.justbrits.com/Articles/TuneWeber.html
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Restoration Thread:http://www.jeepsunlimited.com/forums...d.php?t=434226
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Unread 01-20-2009, 02:49 PM   #4
Fjguercio
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1978 CJ7 
 
Join Date: Dec 2007
Location: Burnsville, MN
Posts: 2,814
Vking... you still there?????
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Unread 04-24-2010, 07:13 AM   #5
kjhibbs
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1981 CJ8 
 
Join Date: Jan 2008
Location: Independence, KS
Posts: 245
Quote:
Originally Posted by keith460 View Post
Assuming you have the Weber 32/36 DGEV carb, is it correctly plumbed for fuel lines, both supply and return?

Example:


How about the proper routing of vacuum lines from the carb?

Example:


There is also a few websites that will help in tuning your carb and one in particular comes to mind and can be found here: Weber Carb Tunibg

I am resurrecting an old thread, but how did you run your breather line on the rear of the valve cover with the new carb, and where did the purge signal receive vacuum in your second picture?
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Unread 04-29-2010, 04:01 PM   #6
keith460
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1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 5,039
Here's the picture that shows the the hose for the PCV system air intake connected to the rear of the valve cover and stock air cleaner assembly.



The purge signal for the Charcoal Canister receives its vacuum source as shown in the picture posted previously from the Weber carb labeled "B" (additional ported vacuum source) and then an adapter splits it into two labeled "C" and "D" that go the the canister and cto switch.
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