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need help getting tuned

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Old 11-06-2007, 01:51 PM
  #1
jesskrza
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Default need help getting tuned

i just got a exceed mutant with the 18 cxp motor.after third tank of fuel it lost all power and dies at full thottle.what could be the probblem?
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Old 11-06-2007, 02:18 PM
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eclipseaudio4
 
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Default RE: need help getting tuned

well what is happing? do you have blue smoke is fuel comming out of the exhaust? is your glo plug working? what happens when you try to restart it? how hot is the engine?
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Old 11-06-2007, 02:36 PM
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Default RE: need help getting tuned

Have you checked temps at all durring break in. If you dont pay attention to your temps durring break in it is very easy to overheat teh motor. And if you do it several times you can easily loose the pinch in the cylinder. Also you may have to replace the glow plug 2-3 times durring break in. Change the plug and try again.
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Old 11-06-2007, 04:36 PM
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Quote:
ORIGINAL: jesskrza

i just got a exceed mutant with the 18 cxp motor.after third tank of fuel it lost all power and dies at full thottle.what could be the probblem?

if you dont have a temp gun, put a little water or spit on the head of the engine while your running it and see what happens, if it sizzles right away, its too hot, if it sits and evaporates in a few seconds your ok. if it sizzles you need to richen the mixture.

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Old 11-06-2007, 05:15 PM
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jesskrza
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Default RE: need help getting tuned

ok i have it tuned good.but the needle valve has to be 4 1/2 turns out.i don't know how to check for air leaks.it runs good just don't know why it has to be so rich?
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Old 11-06-2007, 05:23 PM
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Default RE: need help getting tuned

if it runs good and not hot, dont worry about it. thats alot of turns out though, i think you have an air leak, i would suggest spraying some fuel around the base of the carb, backplate and see if the idle changes, if it does then thats where your leak is. spray a little at a time, maybe put some fuel in an old, clean windex bottle.
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Old 11-06-2007, 05:43 PM
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Default RE: need help getting tuned

ok thanks.so does anyone know what kind of take off power it should have?it seem fast for what it is.but it seems to not have the best take off power.is it cause its a small motor or is 1:8.5 high gearing for the car?
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Old 11-06-2007, 05:46 PM
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Default RE: need help getting tuned

you may have your low needle set to lean or rich, it should be flush with the collar and the high end should be 2 1/2 out. i would set it to these settings, watch these videos about tuning and see how it works for you. you may just have you low end needle too lean.

http://youtube.com/watch?v=oSmMzpZM_As

http://youtube.com/watch?v=BJFsJAxNoRg
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Old 11-06-2007, 06:19 PM
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My money is on Ehroof there.....


Wolv.
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Old 11-06-2007, 06:49 PM
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ok thanks i will try it tom.
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Old 11-06-2007, 06:50 PM
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good luck and let me know how it works out, if it doesnt help, let me know, we will figure it out.
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Old 11-07-2007, 01:19 PM
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jesskrza
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Default RE: need help getting tuned

so i ran it for a few min. and put some water on the head and i would guess its way to hot it sizzled and was gone as fast has i put it on.so i most have a air leak.to rich wouldn't make it hot would it?
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Old 11-07-2007, 01:21 PM
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Default RE: need help getting tuned

i have tohe low end 3 1/2 turns out and thats flush with the collar.if i turn it out anymore it losses all power.
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Old 11-07-2007, 01:59 PM
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Default RE: need help getting tuned

whats your h igh end set at? I flush on the low end is stock and after break in most have to turn it in a bit. Running to rich will not make it run at
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Old 11-07-2007, 03:06 PM
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Default RE: need help getting tuned

put the high end to 2 1/2 out and the low flush with the collar and see how it runs and let me know, you do know the needles right?
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Old 11-07-2007, 06:06 PM
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Default RE: need help getting tuned

i have the low end flush and the high end 4 1/2 turns out.i ran 1/4 tank though it and it was at 280 degrees.is that to hot?on the high end needle valve should there be a washer on both sides of the fuel line?or is the both self sealing?
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Old 11-07-2007, 07:00 PM
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Default RE: need help getting tuned

i am pretty sure there is a rubber o ring on the needle, i never took mine out on the vx but most if not all have a rubber o ring on them. 280 is hot, unless your giving it a beating and its warm out.
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Old 11-07-2007, 07:02 PM
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Default RE: need help getting tuned

bro, maybe your tank is clogged, there has been a few problems with clogged tanks, maybe your fuel flow is restricted, take the fuel line off the carb and off the exhaust, blow in the exhaust line and see how the fuel comes out of the other side, there may be a little restriction, not much, if its hard to get fuel to come out, thats the problem, clogged tank.
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Old 11-07-2007, 07:06 PM
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Default RE: need help getting tuned

i only ran it like three min. to get it that hot.inside the needle there is a o ring but im talking about the fuel line were the needle valve goes though the little ring at the end of the fuel line.if it needs washer there cause it has one on top but not the bottom.
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Old 11-07-2007, 07:24 PM
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Default RE: need help getting tuned

you need to post a picture, i really dont know where your talking about, if you didnt touch it, i am sure its ok. has this been happening since you started the car? did you check the tank like i said?
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Old 11-07-2007, 11:20 PM
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jesskrza
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Default RE: need help getting tuned

ok i check everthing for leaks and can't find any.checked the tank its not clogged.watch the tuning video.did what they said i got the car running great.i have the needle valve 4 turns out and the low end 3 turns out.but it still is getting to hot.its ran up to about 300 degrees and started to die.so i stopped driving it.i tryed to richin it up to were it stated to not run very good.it still ran at 250 degrees.so i have no clue what the probblem could be?and what temp. should they run at?
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Old 11-08-2007, 01:33 AM
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jesskrza
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and does anyone know any name brand cars that parts would inner change with my exceed mutant.like a hpi or traxxes. something my local hobbies store has heard of.
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Old 11-08-2007, 07:07 AM
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are you running with the b ody on or off? Do y ou have wholes cut in your body for airflow?
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Old 11-08-2007, 11:48 PM
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jesskrza
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i haven't ever ran it with the body on.
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Old 11-09-2007, 06:38 PM
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jesskrza
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Default RE: need help getting tuned

i got sick of not being able to drive my car.so went and order a new motor.i got the o.s. 18 .every one said that its way bet and faster with more power then the vertex 18 that was in there.so is it really as much faster as everyone says it is?so what can i check next on my motor that i have?i don't just want to get rid of it i still want to try to get it fixxed.and everyone said that a .26 motor was to much power and it would tare my car apart is that true?
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