Originally Posted by Arboleda
Hi, I picked up a used 8ight for my first nitro car and I'm learning the tricks of tuning the engine. I'm getting some of them down - I know how to at least tune the low and idle enough to get it started and keep it running.
When I punch the throttle it'll fly on an open parking lot for 1-3 seconds but then it sputters and seems to idle despite my trigger being all the way down. Then it will come back to life for another second or two. 1 out of 4 times it'll stall out completely.
I was told that the stuttering is a symptom of being too lean and that I need to make the high needle richer. But I don't understand why I'd be seeing plenty of smoke if it's rich.
Richen the high end needle 1/2 - 1 turn. If it still does it, then start to lean it back out. You can still see exhaust fume from the pipe because it has some fuel to burn in the chamber, just not enough. My Dad found this out the hard way with his t-maxx and burned it up.