It leaks sometimes and I can't prime it due to negative pressure being lost, but most of the time it holds and I can get the car started, I just came back from a very successful run at my high school and should have a video up in a bit, I need some help knowing if it sounds good or not, I set low end needle with the fuel line pinch test and adjusted the high end with temperature (I got a hand held laser thermometer) and the idle... well idk it idles at a low rpm without a problem so i guess thats a good sign, and it starts up by the 5th pull now. It does stall periodically when I first start it and warm it up but once I get it going it really goes with only half throttle, I simply don't have enough room to go full to the floor. So I think I tuned it right? Anyway I'll post the video on here when its off my phone and have yall decide if it sounds tuned or not.
If you post a video, it would be helpful to see you start it and tune the needle while being able to hear it. On my RC airplanes, I do 99% of the engine tuning by ear. Unfortunately, I can't offer much advice on the fuel tank issue. Apparently RC car fuel tanks are different the aircraft tanks.
Don't know if this will help you, but on an aircraft, once the engine is running and I think I have it tuned I pick up the plane and briskly point the nose almost straight up. The fuel mixture will lean out a bit, and the engine will die or nearly die if set too lean. Then I point the nose nearly straight down. If it is too rich it will die. This just a quick and dirty method of testing your fuel mixture on an RC plane, not sure if you can do something similar with a car or not.
