I have a stupid question

[Nitroaddict]

i had this problem with my last engine too - and i just replaced it with a new CV-R. I thought it used to be an engine problem, but now i think its me. i cannot let my car idle for more than about 5 seconds without it stalling. i also have to give it a lil gas while its on the starter box to get it to fire. i see people all the time at the track that start their cars without doing anything just stick it on the box, it fires right up and then sits there and idles. what am i doing wrong. i dont think the LSN is too rich, as it doesn't bog down before it quits, and i dont think its too lean, because it has to clear its throat a bit before it gets up and going when i hit the gas. i must be wrong though, as i cannot think of anything else it could be. any ideas?

 

[militarymaxx]

Same kind of problems here also. Just when I thought I had things tuned right, the engine started doing things. (See my post on blown bearings). I am only hours away from purchasing a new engine but I'm worried that what's wrong with these engines is me and not some defect. I read the posts, I talk to folks and have concluded that if you put 10 engines, all the same, side by side, that each one would tune differently. That there is no magical pot of gold at the end of the tuning rainbow. Some days it hit or miss. I clean my buggy, pamper it, give it all the good fluids and I struggle. Then there's the guy who never uses afterrun oil, never cleans the days crud off of it, has never touched the needles from day one, and the thing starts right up, idles beautifully, and runs all day at the prefect temp. When he's done he tosses it in the back of his truck and doesn't touch it until next weekend. And then of course it will run fine on that day too. I feel your pain man, I really do. So, all you super tuners out there, go buy stock in OS, cuz I figure I will be buying one a month.

 

[Candyman]

If you think you have the tune right, then there are a few other things to consider. First off, I don't know what car you're talking about. But you may want to check a few things. Check the clutch. If it's rubbing or prematurely engaging (I hate that), it may cause the engine to stall at idle. Make sure nothing is rubbing in the gear train. The engine needs to be free to spin on it's own at idle and if anything's rubbing, it will stall.

Because you say you have to clear the engine out a little to get it up and running, I would think the LSN is a bit rich. I would lean it out a little and see if that helps, too.

 

[Nitroaddict]

Originally posted by Candyman
If you think you have the tune right, then there are a few other things to consider. First off, I don't know what car you're talking about. But you may want to check a few things. Check the clutch. If it's rubbing or prematurely engaging (I hate that), it may cause the engine to stall at idle. Make sure nothing is rubbing in the gear train. The engine needs to be free to spin on it's own at idle and if anything's rubbing, it will stall.

Because you say you have to clear the engine out a little to get it up and running, I would think the LSN is a bit rich. I would lean it out a little and see if that helps, too.

i am referring to my NTC3. i originally thought it might be the clutch on the last engine. i now have shaved shoes, and firm (gold) springs. so there is no way the clutch is engaging. when i did that repair, it drastically helped my last mill, so good call.

the drive train is fine, and nothing is binding there.

i was also thinking it might be a bit rich, be aware that this is a slide carb - and i am not as adept at tuning those. when i had the LSN leaned a bit more, the engine performed better but would stall much wuicker than it does now.

any ideas as to my other question? does everyone here have to give the car a lil gas to get it to fire when using your starter box, or will it just start right up?

 

[FastEddy]

Candy is right in his post above about pre-mature ....
I would also play around with the LSN. Get the pinch test dialed in then adjust your idle up a bit. Its ok to run it a bit on the high side. One way to test the idle before turning the screw is to use the trim on your TX. Use the trim to adjust your idle and see if it makes a difference. If it does, make the adjustments on the engine and set the trim back to 0.

My radio has a startup feature that will allow me to increase the idle for startup. You can program in positive trim for starting and warm-up. Once you are up to temp, press the button and it will go back to normal. If your radio doesn't have this feature you can use your trim to artificially increase the idle. Don't forget to set it back to 0 after its warmed up.

This may not be your answer but its worth a try.

 

[Nitroaddict]

Originally posted by FastEddy
My radio has a startup feature that will allow me to increase the idle for startup. You can program in positive trim for starting and warm-up. Once you are up to temp, press the button and it will go back to normal. If your radio doesn't have this feature you can use your trim to artificially increase the idle. Don't forget to set it back to 0 after its warmed up.

i do have this feature and use it. that is what i mean when i refer to giving it a lil gas. prob is even once it warms up i cannot get it to idle reliably. keep in mind that this engine is still very new, only 1 tank after break in through it. total of 7 tanks.

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ur idea regarding increasing the idle speed is a good one - i would assume u have to be careful not to increase it so much that the clutch engages though, is this correct?

 

[RobH]

I'm with the rest of you. It sounds like you're LHS is a little bit rich.

Needing to give it throttle to start it is the same problem. Giving it some gas on the starter box opens the carb and artifically changes the mix to give it more air than fuel. Take some fuel away and you won't have to add more air via the throttle to start it.

This may sound silly, but wouldn't turning your idle down too far also cause the same problem?

-Rob

damn Eddy beat me to the idle screw idea. I post too slow.

 

[Nitroaddict]

Originally posted by RobH
I'm with the rest of you. It sounds like you're LHS is a little bit rich.

i think my LHS is flat broke - but my LSN might be rich. hehe

Needing to give it throttle to start it is the same problem. Giving it some gas on the starter box opens the carb and artifically changes the mix to give it more air than fuel. Take some fuel away and you won't have to add more air via the throttle to start it.

That makes sense - and i never thought of it that way. always thought the opposite. makes sense.

when i go home - first i will try to lean out my LSN, (not my LHS) then i will start on the idle. thanks!

 

[FastEddy]

Remember when you lean the LSN it will most likely increase the idle as well. :yes:

 

[Nitroaddict]

good point eddy, i will remember that.

 

[HumboldtBlazer]

well that was happening to me and it ended up being an air leak.

 

[joneser4u]

Have yall checked the opening on the carb, sounds like you might need to open it up alittle?? just my 2 cents

 

[El Pirata]

Originally posted by Nitroaddict
i had this problem with my last engine too - and i just replaced it with a new CV-R. I thought it used to be an engine problem, but now i think its me. i cannot let my car idle for more than about 5 seconds without it stalling. i also have to give it a lil gas while its on the starter box to get it to fire. i see people all the time at the track that start their cars without doing anything just stick it on the box, it fires right up and then sits there and idles. what am i doing wrong. i dont think the LSN is too rich, as it doesn't bog down before it quits, and i dont think its too lean, because it has to clear its throat a bit before it gets up and going when i hit the gas. i must be wrong though, as i cannot think of anything else it could be. any ideas?

I have a stupid answer, where's your HSN set? What temp are you running. I know my t-maxx will hardly start unless the throttle is pulled almost all the way open but when it fires the thing flies. I just accepted it as the way things were and dealt with it. Sorry I was not more helpful.

 

[RobH]

Originally posted by Nitroaddict


i think my LHS is flat broke - but my LSN might be rich. hehe

yeah yeah LSN not LHS. smart ass

damn i think i just killed a kitten

 

[Nitroaddict]

Re: Re: I have a stupid question

Originally posted by El Pirata
I have a stupid answer, where's your HSN set? What temp are you running. I know my t-maxx will hardly start unless the throttle is pulled almost all the way open but when it fires the thing flies. I just accepted it as the way things were and dealt with it. Sorry I was not more helpful.

i grew up as a mechanic - so i wont accept anything if i know it can be fixed. the engine starts fine and runs till its heart is content - but whether the mill is cold or nice n hot, it still wont idle for very long, and i still have to open the carb a lil to get it to start. i am thinking that it is the prob that rob said, and am going to check it out. also going to open the ISS a bit so that it is idling as high as possible without engaging the clutch. regarding the HSN, its set at 1 3/4ths out. and i am runnin 230-235 after it warms up.

i havnt had a chance to fire it up yet as it rained all day and all night yesterday.