My engine has got the ADHD!, Can't get my engine to idle at less that 1000 Options

[tornik550]

On my dual weber 44idf, 2258 engine- I cannot get my engine to idle at less than 1000 rpm. I have backed out both idle speed screws all the way. I unhooked the linkage. I played with the timing (which will slow it however it runs like crap). I adjusted the mixture. I even put new throttle plates in the carbs and synced them. I made sure the throttle shafts were not bent.

My old throttle plates were worn which I feel let too much air in. I replaced the plates with new ones which I thought would correct the problem. I was able to get the idle to go down from 1200 to 1000. I shined a light under the plate after installing them- I can see a very slight amount of light from between the plate and barrel wall.


Any ideas?

[tornik550]

I think sending my carbs off to get them rebuilt is an excellent idea. Any idea of the general cost of something like that? I probably won't send them off til winter.

Also, are butterflies supposed to close 100% if the carbs are unhooked? Mine are not visibly open however you can fit a thin piece of paper between the throttle plate and the barrel wall when the carb is not hooked up- is normal? Is it possible that the plate simply don't close enough (even though they are visually closed)?