jato is a month old, it ran great last time i had it out, except it would stall if i did a high speed pass and then let it idle. I turned the idle up a bit, and messed with the low speed needle and now it will idle all day long no matter what, GOOD!

now i have a whole different problem...the car will rip untill i open the throttle up...then it bogs and stutters real bad, if i hold the gas off the line it will barely move, won't even spin the tires, just bogs and sputters and will stall. if i smack the gas only half throttle off the line i will get hit with a roost, and then it'll get up to speed and i open the throttle and we have no acceleration...i tried runnin it a bit richer, didn't help, leaned it out a bit and it seemed to help a little, but then the car warmed up and it did it again!! i wanted to keep tuning (it took me 3 tanks of gas so far) but the damn EZ start died, i think im gonna ditch the EZ start for a pull start.

earlier in the day it was runnin great, it would float a wheelie for quite awhile through the lawn...don't know what it's doin now.

could the glow plug have anything to do with it?? (also, it seems like it spits some fuel out the tip of the exhaust) but then if i lean it out....it doesn't even start....****!!



(this is posted in RC engines too just so i don't get flamed for it, just think i'll get better responses here!)

You say that you have fooled around with the low speed needle, which way did you turn it and for what reason? When you say you are trying to richen it or lean it and this does not help, are you still using the low speed needle to make these adjustments? To me it seems like it is still running lean but it is hard to tell at this point.

My suggestion would be to return to factory settings for your particular engine and then tune from there. Always start tuning the high speed needle first.
These are the two methods I would suggest when trying to dial in the low speed needle.

1)
Pinch the fuel line from the carb to the tank. About a 1/4 inch away from the carb. If it dies in less than 1 second +/- a bit, it is too lean. If it is around 2-3 seconds, you are in the "general" area. If it is greater that 3 seconds, it is too rich.

OR/AND

2)
Idle the engine then give it full stick. (WOT) If it dies and sounds like it has been choked it is usually too lean. If it accelerates great then bogs in the high RPM’s it is most likely too lean.(Sounds similar to your problem) If it makes a gurgling noise (loading up with fuel) then dies, it is too rich.

You should get a consistent acceleration when properly tuned. Listen to the type of noise created by the engine as they correspond with the needle setting, during the acceleration.

As for the glow plug, it wouldn’t hurt to take it out and inspect it as this could be a possible cause. Look at it to make sure all the coils are bright orange while your glow starter is attached.

Hope this helps, its great when these machine are lively rather than on the bench

Ryan

Well, i was runnin the hsn at factory setting, and i richened the lsn, and it was bogging at full throttle when it was warm. I just ran two more tanks of gas through it-here's what happened-i ran it around the yard at a couple high speed passes, did a few cartwheels with it and so on. I let i let the engine get to operating temp and it would slowly idle down and then stall, i restarted it and leaned out the lsn slowly and ran it wot then back to idle and after about three tries i was good to go, but it was startin to bog at full throttle again so i turned it about 1/8 turn richer and it got a little better. I shut it down and let it cool off and refuled, i took it down the street with the gearbox adjusted so it just wouldn't shift, so i could run it wide open, and it started bogging a little bit. I turned it about 1/4 turn richer than stock settings and now it's running like a dream. But in other news

the jato is being shipped to california tomorrow, im trading it for a T Maxx with an SH .16 and full roll cage. I do love the jato, and if i really really miss it i will sell one of my T Maxx's and buy another one.