Originally Posted by AADrcw
As soon as he got the car we replaced the lines with brand new lines, The fuel is brand new as of a week ago, and we checked the tank for air leaks(and cleaned it out completely before running it), I am probably going to pull the motor out tomorrow and check it for leaks as I have no other idea of what could be causing it.
The funny this is the tank seals fine but it seems like around a half tank it will get some bubbles in the line and die but after that it doesn't do it again till empty. It doesn't have air in the lines when it is idling just always at half tank. The weird thing is the car runs perfect as long as you don't let it sit and idle. it has good power and it doesn't overheat or anything like that. it just wont idle no matter what we do.
When you immediately try to start it again, does it start first time?
If so, it would seem your bottom LSN needle is a little rich, regardless, this is normal, a nitro engine is normally tuned a little rich on the bottom as to lubricate the engine off throttle while at full throttle it will be lean and in need of lubrication
The more you attempt to tune the engine to achieve a permanent idle, you are very likely to run into problems when running thec ar under load and a throttle after run is what I expect you to have to deal with next.
By opening the idle gap too far and allowing too much air in during a rich idle mixture will pose other problems when you lean out the engine down a long straight
Ideally, you should clear the crank after 4-5 seconds while idling to keep the engine crank from flooding.
You should also check your clutch.