Weber 34 DGEC conversion Help -
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post #1 of 5 Old 03-07-2007, 08:48 PM Thread Starter
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Weber 34 DGEC conversion Help

As some of you know I finally got my Weber installed today. It is on an 86 6 cylinder. Well I have a few of questions.

1. Were do I connect the hoses supplied for the air injection system. I am going to drill the holes in the air cleaner but were do the hoses connect on the other side.

2. Got it started but it immediatley shut down. all of the vacuum hoses I found are plugged and all of the connections are on correctly that I can see. When I started the engine it smoke came out of the exhaust and I had to keep the pedal pressed to keep an idle.

3.In the instructions for an autonatic tranny it says "with a helper inside the vehicle adjust the linkage rod so that full throttle is attained". What are they actually saying here?

when I hold down the gas pedal it will run but it is running rough. could this be because I do not have the air injection hooked up yet?


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post #2 of 5 Old 03-08-2007, 07:19 AM
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I dont know if with a weber you can still use the air system..Its ideal to run a weber with no emisions hooked up...
what I would do is disconect the un-needed vac. lines and replace the few you will need such as the vac. advance to the dizzy,pvc,crank case vent-ccvand possibly the brake booster..Do a nutter bypass on the computer....The deal with having a helper inside to make sure its hitting full throttle is....Have a buddy inside pressing wide open on the gas,while not running to make sure the linkage on the carb is opening full throttle and activating the kickdown on the tranny for your passing gear..Make sure you also have a fuel pressure regulator hooked up and a bypass to the return line to the tank..

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Last edited by Mr.Crowley; 03-08-2007 at 10:00 AM.
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post #3 of 5 Old 03-08-2007, 09:00 AM
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I don't have an automatic so can't help you there. Maybe these pictures will help with the vac connections.

You want to connect to 2 hoses that were connected at #4 in this photo to the fittings in the weber air cleaner. Scroll down the page and you will see a picture of the tubes themselves.
Good luck.

84 CJ7 w/ 258, T-176, Dana 300
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post #4 of 5 Old 03-08-2007, 01:17 PM
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On my air injectors I cut the hoses off and put some breathers on ($10 at autozone) rather than cutting up my new air cleaner.

I have the air injector valves connected to manifold vacuum via the heat switch.

Follow Scrambeled 's suggestions. Nutter bypass and do the best lean idle adjustment.

The instructions in my kit were wrong on connecting the distributor vacuum line. It showed using manifold vacuum but that would advance the timing at idle which you don't want. Use the ported line on the carb (its the highest up line on the side) so you get more vacuum when the throttle is open.

I just put the same carb on and had trouble with mileage (9mpg) and power.
The things that worked for me:
New plugs, wires, distributer cap, rotor.
Nutter bypass
Best lean idle adjustment
Set timing to 1 degree below knocking (drive, adjust, drive, adjust...)
Fuel regulator set to 3#
replaced the jets, both the idle and main jets.

The ones it came with were too rich. I ordered an assortment from Weber and trial and error until I got a combination with good power and mileage. I also temporarily installed a mixture meter.

Now I have good power from idle to redline and 16 mpg!
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post #5 of 5 Old 03-08-2007, 01:45 PM
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The Nutter is a must when moving away from the stepper equipped carter. I have the same carb on an 84 and it runs like a top. The PO had removed the pulse air system so I did not have that to worry about. I did the nutter, TFI, got my echoke, manifold heater and vac lines connected, installed a FPR and did minor lean idle tuning and it idles and has no hesitation when floored.

84 CJ7 w/ 258, T-176, Dana 300
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