how do I adjust idle on my 79 mgb
its idling at 1400 rpm's
Go to this link. It will teach you how to properly adjust your S.U. carbs. Excellent article and I could not have given you better instructions. Good luck. http://www.mgaguru.com/mgtech/carbs/cb130.htm
Here is the other link I was looking for: http://www.gerull.nl/mg/technics/carb/carb_tuning.html
I hope this photo comes through but I don't see it now. This is what the Unisyn looks like.
idle is adjusted at 950, when i take and drive it the idle jumps to 1500 and won't come down. before this started it was running fine and then i got like a vapor lock so they say and it's been running like crap, can adjust it all the time but still climbs back up there. what would cause this?
How to adjust a Zenith-Stromberg carburetor. https://www.howacarworks.com/fuel- systems/adjusting-a-stromberg- carburettor#:~:text=Turn%20only%20an%20eighth%20of,clockwise)%20to%20make%20it%2 0richer.
In answer to the question about adjusting the idle, I had a similar problem with my B GT a few weeks after I bought it. The weather turned very hot and after a run the idle speed woold be 1000 - 1500 rpm. Due to the lack of use for several years before i got it off the vendor, the throttle spindle was sticking in the body of the cars. The hot weather and the heat of a hot engine caused the spindle to expand and stick instead of closing fully and allowing the idle speed to be 800 - 700 rpm. Just keep squirting light oil on the spindle where it enters the carb body at laest once a week and it will free up. BTW, I recommend Wynnes Carburettor Cleaner. Remove the air filters and squirt it down the carbs one at a time with the engine running at about 1200 -1500 rpm. The instructions on the can are very clear.
