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Discussion Starter · #1 ·
Update: I removed the intake manifold...gasket is good. I could not find anything that would indicate a vacuum leak. I went through the carb... again with good cleaner through all passages and cleaned it out. Put it all back together with a new intake gasket and checked the timing and I still have the same idling issues. I can slam the accelerator to the floor and it will roar to life, but the idle is still really rough.:pullinghair::pullinghair::pullinghair:
 

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I know on my CJ I had to run a pipe cleaner or something small in up into the pickup tubes or venturi(can't recall correct name) look like to fangs in the carb and clean those out.. worked better when I did that.. Not sure if same on YJ..
 

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i know it was mentioned before but now sure that it was fully ruled out, did you make sure the brake booster is not leaking vacuum? you could pinch the big 1/2" line going to it to make sure.
Also you can make a mark on the disi and then adjust it by feel to see if the idle smooths out.
 

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Discussion Starter · #5 ·
Idle

I have cleaned the metering tube, plugged off the vacuum to the brake booster.
I really thing I have a bad carb. I can twist out the idle screw to were it is not touching anything and it will still try to idle, It is tough to find a MC carb with the right size venturi etc.
 

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I have a HEI distributor, so the stepper motor on a Carter BBd is useless for me.
I bought a re-man carb from National Carburetors in Jacksonville FL.
I told them I'm at 6500 feet altitude and they put in jets that they said would work. I was getting poor mileage and emailed their tech help. They offered to re-jet the carb for free. I didn't want to lay up the Jeep for the time it would take, so they sent me another set of jets for free that I installed myself. I think that's responsible customer service.

For a MC 2100 carb, Gronk (the EBAY carb guy) has been getting good reviews recently. Before you buy, contact him and discuss your situation and what issues you've been having. Spending a little time up front saves a lot of time on the back side.

Have you tried setting your carb with a vacuum gauge? Same thing with timing. On these old heaps the factory specs aren't always the best to use. A vacuum gauge will tell you what's going on in your engine.

Good Luck, L.M.
 
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