had similar problems this weekend on our local Tamiya-competition.
I was constantly within the three of for best drivers while qualifying.
First final (starting 3th) battle for first position ... and suddenly, last 30 seconds the car became crazy, coudn't keep in on the track.
I thought it was something as glitches but since I have a spektrum-system that was almost impossible.
I thought about quitting but the continued at slower pace and only lost three places.
After the final, I studied the car but couldn't find anything.
Second final: car drives the same way: crazy ... I just try to keep it on the track .. am lapped once by the top three drivers .. and then suddenly the car "is back". It drives as it did all morning ... and I was able to keep up the pace of the top guys easely.
Checked the car again and found nothing.
Last final: car still "back" and we battled for first position with three drivers ending all three within 0.5 second.
My car felt ace again, as it did all morning.
I still don't understand what happened.
Strange thing is that it suddenly changed during the race ... so I thought about something broken ... but could not find anything ... and then even stranger, the car "popping back in again" after about 1 minute in second final.
I'm glad I could finish my competition day with some great driving ... but it's very puzzling not to know what happened.
When acting crazy, the car sometimes steered off, and sometimes it was as it added a dot of full trottle when i was releasing the trigger in the corners. ??
SO it was on steering AND trottle that problesm occured.
About O-rings in my outdrives: I checked those and they were still fine.
I talked it through with some other drivers and they said it could have to do with the spektrum-reciever needing a spektrum-condensator.