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 Post subject: Can anyone help me troubleshoot my truck
PostPosted: Sun Dec 10, 2006 02:48:40 
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http://www.dmp-racing.com/king/MOV03244.MPG

Thats what I have to deal with these days. It was working great, then bleh. It happened last week or so, so I totally cleaned out the engine (took it apart and put it back together) and it still does this. I actually had it at one point where it would run, but the idle was like WAY too high, and if I set it lower it would die. During this if I tried wide open throttle it would again die.

Any ideas? Im at my end with this little truck, so far it has caused me way more grief than fun.


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 Post subject:
PostPosted: Sun Dec 10, 2006 04:04:16 
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You took it apart did you replace some parts?

Start out with manufacture specs. It should get it to run. Specs are Flush on HSN & LSN. Set air gap with throttle @ 2mm.

It should start. First set your idle speed, cuz it will be hi, Turn it to a lower idle. then start turning your HSN, till you have good acceleration. Take a couple laps. then adjust your LSN, turn it CW till your idle rises, and stop there. reset your idle speed....

If you have air in the fuel line it should of cleared it out. Air in the fuel line could be one of two things. Leak in the line, or running it too lean.
So play with it you'll get it going.


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PostPosted: Sun Dec 10, 2006 04:12:58 
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I only have like 15 runs on it, if that so I didnt replace anything as everything looked very clean.

I have the tubing going from the fuel cell to the engine pretty long, as well as the pressure side. Is that correct? Whats the best way to make sure the air gap is 2mm?


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PostPosted: Sun Dec 10, 2006 08:13:32 
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Remove the air filter and physically set it to 2mm. You gunna turn idle speed down after it start anyway. You want it to start and stay runnin'. So you can retune everything.

Length of hose, I like it to be the shortest to the carb, and double the lenth for the pessure side. People have there own believes.


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 Post subject:
PostPosted: Sun Dec 10, 2006 08:27:33 
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Time to change the glowplug !!!!


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 Post subject:
PostPosted: Sun Dec 10, 2006 18:22:49 
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Yeah I changed glowplug too, and set things as close to flush as I could. I leaned it out until it stopped, then backed it out 4 times.


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 Post subject:
PostPosted: Sun Dec 10, 2006 20:43:36 
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Ok I got it running, but when I try wide open throttle it sounds like it will bog down and die.

Any idea what I should check now? The idle is still a tick too high, but if I go any lower it wants to die when I go from applying throttle to no throttle.


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PostPosted: Mon Dec 11, 2006 01:43:15 
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If it is blowing some blue smoke you're fine. if not you're still lean, so richen it up a bit. A tish to hi idle! what it the air gap set at? 1 or 2mm? Manual say 1mm, but could even smaller for advance user. turn down the idle. maybe the top end it wont bog down.


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 Post subject:
PostPosted: Mon Dec 11, 2006 01:47:12 
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But with lower idle it won't die when i'm on wide oopen throttle?


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PostPosted: Mon Dec 11, 2006 03:22:49 
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Lowering the idle wont effect the off idle. its the top end(WOT) you're concerned about. I'm trying to get more info from you to determine where you're at. Cuz, if you're not blowing smoke you're too lean. Rather you run it rich an go from there(lean). Starting out lean causes you more head aches. And confusion. You go sky writing and have good accel w/o stalling you're half way there.


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 Post subject:
PostPosted: Mon Dec 11, 2006 03:29:03 
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Yeah theres plenty of smoke comin out, pretty much from 30% and up. I think I have it running ok, but I still think the idle is a touch too high, but if I go any lower it wants to stall out.

Heres another issue maybe, when I go to WOT, then bring it back down to idle it sounds kinda funny then cleans itself out and idles normal, but once in awhile it wants to stall out.


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PostPosted: Mon Dec 11, 2006 07:21:12 
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So you're sky writing. Your goal is to smoke from idle to 1/3 throttle 1-2 seconds, by leaning the HSN 1/8 turn at a time. Then turn your LSN slowly CW till your idle goes up, stop there. Then turn LSN CCW 1/8 turn. Then turn down the idle speed screw to desired rpm. Your air gap should be .5-1mm.


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 Post subject:
PostPosted: Mon Dec 11, 2006 09:01:51 
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Slammed94 wrote:
Yeah I changed glowplug too, and set things as close to flush as I could. I leaned it out until it stopped, then backed it out 4 times.


Did you get a glowplug or the right glowplug ?


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 Post subject:
PostPosted: Mon Dec 11, 2006 18:22:43 
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geezatec wrote:
So you're sky writing. Your goal is to smoke from idle to 1/3 throttle 1-2 seconds, by leaning the HSN 1/8 turn at a time. Then turn your LSN slowly CW till your idle goes up, stop there. Then turn LSN CCW 1/8 turn. Then turn down the idle speed screw to desired rpm. Your air gap should be .5-1mm.


Ok I will try that. Im guessing Im running it too rich right now? Im still learning nitro stuff, but let me take a stab at this.

I set everything, then lean it out, rpm goes up, so I then turn the idle down, and lean the LSN also?


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PostPosted: Mon Dec 11, 2006 22:22:09 
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Kind of though you were new at this. I try to explain so its easier for you. Since you got it runnin'. lean it out 1/8 a turn CW. until you have good accel, and good WOT. to idle. let it smoke 1-2 sec. Then turn the idle speed down. The last adjustment done will be the LSN. Turn it CW slowly, the idle will rise and stop there. When idle rises it's starting to be lean condition. That why i told you to turn CCW a 1/8 turn. to richen it slightly. Then turn your idle speed down.

At this point you shouldnt touch the LSN, cuz every ajustment will be done with the HSN. HSN is proportional to LSN. LSN adjustment is lo throttle, .5- 1/3 throttle. 1/3-WOT is the HSN adjustment.

Ask more questions it ok!! Be out of here for a couple day. So Good luck with it!!Later!!


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 Post subject:
PostPosted: Sun Dec 24, 2006 07:03:46 
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What if it is great at idle, then WOT in the air, but as soon as you put it on the ground it bogs out when WOT is applied? What do you adjust then?


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 Post subject:
PostPosted: Mon Dec 25, 2006 08:43:30 
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So we're back to the beginning again! How much blue smoke does it blow out? Get it to smoke a bit. turn your LSN CCW til it does smoke, and go from there. eather it be rich then starting at lean setting. rich to lean.


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 Post subject:
PostPosted: Mon Dec 25, 2006 19:46:17 
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I think I got it! I messed with it a lot yesterday until it finally ran good, the idle is still a tick high but at this point I dont care anymore LOL Anytime I try to fix that I get the bogging issue again. It smokes from 1/4 to 1/2 then it goes away.


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PostPosted: Tue Dec 26, 2006 04:22:55 
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At that, smokes @ !/4 to 1/2 thrittle start leaning it with the HSN. Slowly @ 1/8th turn CW.


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 Post subject:
PostPosted: Tue Jan 09, 2007 00:38:57 
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Ok I have it running good now, there is just one "issue" now.

When I go from like 0 - 1/2 throttle then let off, it will rev pretty high, but when I go from WOT to 0 it idles normally.

I dnot know what to adjust to make it idle both the same, its pretty strange how it will go from high idle to normal idle.


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