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?

[rhodyguy]

good fix. trimming the throttle plates prob allowed them to fully seat, covering the lowest progression ports. not seated they were letting some fuel in even with the idle air needles fully closed. i imagine your idle a/f ratio cleaned up.

k