I richened the the LSN and it no longer makes the sputtering sound, but still stalled after 5 mins of driving and will not start again for about 15-20 mins. BTW...I bought a cheap (like 70USD at my local hobby shop) Tactic 2.4Ghz spread spectrum pistol and it is AWESOME! I cannot believe the range. I had it over 1000 feet away tonight and I could still control it (though I could barley see the darn thing). Of course this is when it stalled. LOL...took like 4 seconds to go that far and a few mins to walk it.