I own to trucks one nitro rustler 2.5, one RC10GT megatech .16. both trucks will start and run slow but when you wot they die? Is this a fuel problem or could it be low compression? I am not for sure. Tried adj carbs no fix. Any advice would help. Thanks
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Engine Problems
- Thread starter BADNBADN
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vbgagnon
RCTalk VIP
what conditions are you glow plugs? HSN sounds right, can you accelerate slowly? or not accelerate at all. if you can accelerate slowly then it sounds rich. what does it sound like when it dies?
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To make it idle and run to half throttle, that's the LSN. For full throttle, that's the HSN. When it idles and moves out nicely, your LSN is fine. It it moves out but either cuts out or bogs, that's the HSN.
Adjust your LSN and idle screw till it idles well and will run up to half throttle. (get it to running temp before you finalize any settings) When it idles properly, throttle it to half and see if it stalls or bogs down. If it stalls, it's too lean. If it bogs, it's too rich.
Now go to full throttle. This is when you adjust your HSN. Same thing. If it bogs, it's too rich, stalls, it's too lean.
When it seems to be running good, pinch the fuel line. It should speed up slightly and then stall within 3 - 4 seconds. If it stops quickly, your LSN is too lean. If it takes longer, the LSN is too rich.
Drive it for a while and then take a temp check to make sure it's at the proper temp. If it's too hot, richen the HSN.
You will have to make small adjustments on the HSN almost daily to compensate for outside temperature and humidity.
By the way, the factory settings are for break in, or a starting point if you really messed things up. Once an engine is broken in, don't expect it to run right by going to those settings.
Adjust your LSN and idle screw till it idles well and will run up to half throttle. (get it to running temp before you finalize any settings) When it idles properly, throttle it to half and see if it stalls or bogs down. If it stalls, it's too lean. If it bogs, it's too rich.
Now go to full throttle. This is when you adjust your HSN. Same thing. If it bogs, it's too rich, stalls, it's too lean.
When it seems to be running good, pinch the fuel line. It should speed up slightly and then stall within 3 - 4 seconds. If it stops quickly, your LSN is too lean. If it takes longer, the LSN is too rich.
Drive it for a while and then take a temp check to make sure it's at the proper temp. If it's too hot, richen the HSN.
You will have to make small adjustments on the HSN almost daily to compensate for outside temperature and humidity.
By the way, the factory settings are for break in, or a starting point if you really messed things up. Once an engine is broken in, don't expect it to run right by going to those settings.
Nitro_Freak
RCTalk Addict
you probably just need to lean it out... or just do what rolex said, i'm too lazy to write it out again
nitrokid15
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i had that problem with my rc10gt and i leaned it out like 1/8 of a turn. it is fine now
H
hb1111
Guest
first off how much fuel has been run through the engines when they get low on compression they are a mother to keep running may wanna try a new plug also a crappy one will really hinder the tuning!!!
