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One of my good friends has a MGB LE (79, 80?) running a Mikune carb. The car had this carb on it when he bought the car a number of years ago. It has run well in past, but this summer he's seeing an issue that has cropped up before.
The car starts up and idles fine, but drives badly and makes no power. I drove it briefly, and it stutters badly.
In the past he did have a local shop fiddle with the carb, and they got it to run again for they year -- but now it's back and he's trying to find a permanent fix.
I had him pull the plugs to take a look, and they are below in order from front to back. I'd love some help here. I don't know the Mikune at all (It looks a bunch like a Weber, which I also don't know). To me, this is saying that one side of the carb has an issue of some sort, maybe running too rich on that side.
He did drive the carb with the air filter off and said it improved maybe a tiny bit not not that much.
Thoughts? Ideas?
Plugs:
Carb:
The car starts up and idles fine, but drives badly and makes no power. I drove it briefly, and it stutters badly.
In the past he did have a local shop fiddle with the carb, and they got it to run again for they year -- but now it's back and he's trying to find a permanent fix.
I had him pull the plugs to take a look, and they are below in order from front to back. I'd love some help here. I don't know the Mikune at all (It looks a bunch like a Weber, which I also don't know). To me, this is saying that one side of the carb has an issue of some sort, maybe running too rich on that side.
He did drive the carb with the air filter off and said it improved maybe a tiny bit not not that much.
Thoughts? Ideas?
Plugs:
![Plug1.jpg](http://www.drooartz.com/public/jmgb/Plug1.jpg)
![Plug2.jpg](http://www.drooartz.com/public/jmgb/Plug2.jpg)
![Plug3.jpg](http://www.drooartz.com/public/jmgb/Plug3.jpg)
![Plug4.jpg](http://www.drooartz.com/public/jmgb/Plug4.jpg)
Carb:
![carb1.jpg](http://www.drooartz.com/public/jmgb/carb1.jpg)
![carb2.jpg](http://www.drooartz.com/public/jmgb/carb2.jpg)