Originally Posted by
mdhyams
The idle drops after 3-4 seconds. After that it would take off slow, so I leaned the bottom until it would take off when i squeezed the trigger. It was killing plugs before that. The motor has ran the best and longest with mc59 plug. Thats what makes me think its loading up and killing the plug. I have read that if the plug is distorted then its to lean.
Ok so yes if the idle hangs high for 3-4 seconds then drops that is generally because your LSN is still too rich. It can also be from the HSN being too lean but in your case it seems the LSN is rich. You should be able to rev the engine up pretty high with the wheels off the ground and when you let off it should drop to a nice steady idle fairly quick. If you continue to let it idle for 5+ seconds it will drop down to a lower idle from there but after 3-4 seconds of idle you should be able to give it full throttle again and have it sounds crisp and not blubbering rich.