Hi guys,

I am a newbie to nitro & I have been running a GO 5 port for the last couple of months. Recently, I installed a turbo head button & was pretty happy with the increased power. However, I have run into a little tuning problem. After running for a while, the engine sputters & there's even a loud 'pop' from the exhaust. What could be the cause of this? I measured the head temperature & it was less than 100 deg C. On top of that, I am getting 'sticky throttle' in that the engine is slow to rev down. I know that without further details, it's not easy to figure out what is (are) the problem(s) based on this simple description. Some educated guess would be appreciated. I have just changed a new fuel tank & new tubing because I was getting the 'sticky throttle' earlier so I hope that potential area of concern is eliminated.

Regards,
Joe Ling