ORIGINAL: wookie457
Ok, on the vaccum leaks the filter losing very fast, found slight larger diameter o-ring and tested again-now holds steady. The tank wouldnt hold either, found the orange o-ring in lid very spongy and weak. Again found o-ring with same ID, but very slightly bigger OD. Retested tank will now hold 15 in-mg, and will only drop half a point in 20 secs. As for the lines, just goin to replace.
It is Possible that a Tank that Passes a Vacuum leak test, MAY NOT pass a Pressure Leak test.....Nitro engines don't Use vacuum anyway....
Your Fuel System and Engine must be Pressure Tight to at least 6 to 8 PSI. (A bit Higher is better).
Your 1/10 Engine will produce this amount of pressure from the Exhaust, and use it to Pressurize the Gas Tank.....
If there is an Air Pressure leak ANYWHERE in the system, you will have Overheating problems, and you will NEVER get a Consistent Tune...
It sounds to me like you may have PARTIALLY fixed your Problem......
But ,,,,,310 degrees is still WAY too hot.....
You are either running too Lean, or you still have an Air Leak, OR BOTH....
Keep workin at it Bro.....And keep us informed.....Mebbe we can help you Solve the Problem....