engin is strange

[dirt_bag310]

well now when i start my rustler the engin starts to run at full throtel and i dont know why, my controler is trimed right and so is everything else, i just started expierencing this after i replaced my spur gear and glow pulg. has any one else had this problem or know why it is doing this, and if you do, please reply, thanks.

[CHEETABMXONE]

mine does the same exact thing and once it goes full throttle it dies and i have trouble starting it again and then finally after i get it started it revs really reaLLY HIGH AND THEN GOES LOW AND THEN GOES HIGH THERES NO MID ITS WEIRD I THINK THE NEEDLES ARE BAD OR SUMTHING

[Big Bad Bry]

sounds like both of you are having tuning issues. tunning the low end and the high end needles to get it all working. find the how to section of traxxas and read the tuning section!!!!!!!!!!!

[revolutn]

Indeed.

In fact, allow me to tell you what they are.

Anyone following my posts will know I've been mentioning Tim's mill hasn't been acting real good. And I can't always work on it with him when it is acting up, cuz if I could, I'd be running mine too!


So anyway, when parts that I was expecting to come in Friday for mine didn't I decided to reset his needles today and start fresh.


The carb should have a gap of 1.5mm for the idle setting.

The low end screw: Turn it all the way in and then back it out 1 3/4 turns.

High Needle: Turn all the way in and then back out 2 1/2 turns.


As soon as I did this his car fired immediately....but wouldn't really run cuz it was so rich.

So I just leaned it out ever so slightly (about 1/16 to 1/8) and it would fire and idle.

It was still way too rich as it would bog and all that....but I hit the street with the new Raytek Temp gun and let the engine get warmed up and then started taking readings and leaning it out little by little.

WOW, all I can say is it was running WAY better than it ever did by the time I got the temps up to the right range. It litterally screamed on the top speed, leaped off the line on the low end and was just amazing.

All I can say is that the temp gun proved to be a very worthwhile purchase.

Anyway.....try them starting settings and work yourself to a happily running mill.

Oh yeah.....have you cleaned and oiled your Air Filters?

Hope this helps.

Later,
Revolution

[Big Bad Bry]

now when you were fine tuning it did you do low and high end or just high. BTW great info i need to re tune my engine like you did

[CHEETABMXONE]

THANX FOR YOURE HELP IVE TRIED RESETING THE NEEDLES AND IT WILL FIRE BUT FOR SOME REASON IT WONT DO IT AGIAN UNTIL I TRY EVERYTHING ELSE AND GO IN AND 2 HOURS LATER I WORK ON IT DOES THE SAME THING SO IM GOING TO GO TO ONE OF MY LHS AND ASK SOMEONE THERE IF THEY THINK I SHOULD GET A NEW CARB OR THEY WILL TUNE IT FOR ME CUZ THE GUY THAT OWNED IT BEFORE ME PUT ALL KIND OF DIFFERENT NEEDLES IN IT SO IM JUST GONNA SEE WHAT THEY SAY CUZ ITS TAKEN SO MUCH WORK AND ITS STILL NOT WORKING

[revolutn]

Bry,

The low end got a small tweak first to level out the idle.

It was very minor maybe 1/16 to an 1/8th of a turn.

Once it would idle I took it out to warm up and then started leaning out the high end.

Later,
Rev

[Big Bad Bry]

thank you ssssssssoooooo muchy rev, i need to go try that right now, i now have a good idea of how to tune my engine, thanks so much