usa98030

My idle skrew is about 3 mm out and nitro rustler is moving like 1mph after 5 min of running. I don't know if this is normal or not because I'm new to the sport.

Alan D.

Low speed needle is probably to lean

usa98030

and if i pull it directly to full throttle the engine will cut out, but when i pull to full throttle on a 2 second count i runs fine.

Alan D.

do you get smoke coming out of the pipe when you do that

usa98030

yup and its a little rich just slightly but just idleing problems

Alan D.

When you go straight to full throttle from a stand still do you get allot of smoke no smoke or just straight dead

usa98030

fairly amount of smoke and if you want me to PM a video. Ill make the video tommorow and post it on youtube and you can take a look at it. tell me what i should do so you can determine what i need to adjust

Alan D.

That sounds like a good idea.
One thing that I came up with:
The last time I had a TRX engine I noticed that if the idle screw was really far out that it would crate an air leak and the idle would go up even though it was really low.
Try to screw in the idle screw flush with the carb body and then readjust from. there.
That's pretty much all I can think of with out looking at it.

usa98030

how do you post pictures i have picture of the idle skrew.

Alan D.

I use photobucket to post pictures

usa98030

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RETRO RC

hey USA,

remove your air filter and with the radio on check that your Idle gap is around .7 to 1mm and that your carb is closing completely at zero throttle.
once the idle gap is in this range richen up the top end as it sounds like you maybe too lean on the top and too rich down low.

heres a little test to try:

get the engine up to temp at the settings you have now about 2 mins running or so

give the car a good full throttle run away and back and bring it to a stop close to you and listen to the idle

if it comes to a stop and revs quite high then drops back after a few seconds it usually means you are to lean on top and to rich down low.

if so check to Idle gap first then richen the top end by 6 hours-1/2 a turn to start and lean the bottom slightly maybe 3 hours-1/4 of a turn.

Keep checking this untill the idle remains pretty consistant after a run away and back.

also do the pinch test

to do this you pinch off the fuel line to the engine about 10mm 1/2 inch from the inlet nipple the engine revs should only pick up between 500 to 1000 rpm
before cutting out if they pick up significantly your too rich down low if they don't increase your too lean down low.

give these a try and see how you go if they don't work you may have a air leak somewhere in you setup- fuel tank, fuel lines, exhaust gaskets, carb etc
it's just a process of ilimination

hope this helps good luck

Adrian

Alan D.

Yup thats way to far out. When I ran those engines the idle screw would be flush or in 1mm from flush. Its causing an air leak and running with a high idle after 5 min because the engine has come up to temp.
Screw it in flush and re-tune your engine and you should be good to go.

BOOST

Nice one Adrian, I couldn't have said it better myself.....

RETRO RC

HOLY AIRLEAK THROUGH THE IDLE SCREW BATMAN

definately reset your idle gap and start again you should be fine