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08-03-2008, 11:37 AM
|  | Stranger | | Join Date: Aug 2007 Location: Austin Texas
Posts: 20
| |  stay off the sidewalk I'm back on the road
Thanks for everybody's info, jeep is running again. I think it was the fuel pump and maybe an old cracked fuel line, and the timing was off. Maybe I'll try rebuilding the carb next just for the learning experience.
Thinking about switching to the weber 34 DGEC carb.
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08-03-2008, 03:05 PM
| | Stranger | | Join Date: Aug 2007 Location: Austin Texas
Posts: 20
| | running again
Thanks for everyone's info. Running again. Put on new fuel pump and fuel lines, and adjusted timing a little more. What puzzles me is the inconsistent operation. Drive for a few minutes, stopped at red light and it idles real low and sometimes dies. Stop somewhere for a few minutes. Runs fine and then idles fast at a light. Everytime I start it, it idles differently sometimes high sometimes low.
Thinking about switching to a weber 34 DGEC carb. What da ya think?
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08-03-2008, 03:26 PM
|  | Moderator | | Join Date: Dec 2001 Location: Belleville, Illinois
Posts: 9,616
| |
Slightly retarded timing can make it do that. It idles OK but a little on the fast side. Then it slows down a little, the centrifugal advance comes down a little, which slows the engine a little, so the vacuum drops a little and the vacuum advance retards a little, and it goes back around until the idle gets way down low and might even die. Or the first step doesn't happen for whatever reason and the idle stays high.
That's just one possibility, and the carb could be at fault too, but I think you're better off to get it running right with what you have before you go doing a swap.
We frequently get a post saying 'It was doing this, so I swapped this and it didn't help, so I did that and it didn't help, so I swapped the other and that helped a little but now it's . . .' By that time the picture is so muddled that it's impossible to diagnose because there might be several new problems added to the original one. Or two or more problems that partially cancel each other out. Or maybe not.
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08-03-2008, 03:54 PM
| | Way Outta Control | | Join Date: Sep 1999 Location: usa
Posts: 10,698
| |
Check the fast idle cam on the carb. Sounds like it's catching on the step, then not catching it. Bend the linkage slightly so it's not right on the edge of the first step.
Going with the Weber is asking for problems. They are good carbs, but too touchy.
Ford MC2100 is what most people convert to. Do a search here - lots of info!
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