Tuning Help, Hong Nor x1x Sport

[g4m8l3r]

Hi Everyone,

I'm new here and quite new to nitro cars also. I have been given a Hong Nor X1X Sport recently and having a few issues with it. It has recently had a new replacement engine fitted but not long enough for it to be tuned/setup. On top of the engine the heatsink says HK 25, what does this mean?

Firstly I am having an issue starting it, I have replaced the fuel line, fuel filter and glow plug. I was told by the prior owner to warm the heatsink up with a hair dryer for 30 seconds then prime and put the glow stick on and it will start and this did work. I was told the reason behind this was the glow plug was shot so I went to my local RC shop and was given a medium heat plug, I fitted this along with the new fuel pipe and filter and it wouldnt start, even with the hair dryer trick. I checked the plug on the end of the stick and it was glowing. I put the old one back in and it fired up again using the hair dryer.

I am using byron gen 2 20% fuel.

Secondly, when it is running I have to quickly pull the throttle or it cuts out, once revved it up (low rpm) its fine and doesn't cut out, however it does rev up on its own randomly and spit out of the exhaust.

Hope you guys/gals can help me please.

Kind Regards

 

[Nitrotrout]

Any other identifying markings like the sides of the crankcase and such? What color is the cooling fins?

 

[g4m8l3r]

Any other identifying markings like the sides of the crankcase and such? What color is the cooling fins?

Nothing that i cam see. And the color is black.

 

[g4m8l3r]

Ideas anyone?

 

[ninnon]

Ideas anyone?

Check if the throttle servo is twitching, if so replace the batteries in the car and remote to be safe. As for fuel coming out the exhaust- follow this guide to lean out the engine, it also sounds like you have a low idle- which may be making it more difficult to start. Here's a great guide for that too:
https://www.rcnitrotalk.com/forum/threads/nitro-tuning-tips-and-tuning-flow-chart.60832/

 

[Greywolf74]

Sounds like tuning issues to me. Check out the great tuning flow chart that is stickied at the top of this forum. Reset your engines needles back to factory settings and start from the beginning.

 

[ninnon]

Sounds like tuning issues to me. Check out the great tuning flow chart that is stickied at the top of this forum. Reset your engines needles back to factory settings and start from the beginning.

yep

 

[Greywolf74]

yep

yep