I'm having a strange idle problem with my Evolution 26. If I set the idle speed to get a good idle the engine will die when throttling down from high rpms. If I raise the idle speed high enough so that it doesn't die, when i throttle up and down it will idle at a low rpm for about 5 seconds then the rpms increase about 1000 rpms. I've tried adjusting the needles, both high and low, and it doesn't change. I've taken from sloppy rich to die in transition lean with no improvement. Throttle servo is fine as is the linkage. I cleaned the fuel screen in the carb and pull the needles and cleaned. the carb was clean inside.
Anybody have any ideas?
James