New muffler and tuneing problem!!!

[Nitro robbo]

Ok people This is my current issue!!!.
So I got a new muffler today. For starters it's a shorter pipe but has a slightly wider chamber.I also purchased a medium glow plug.my engine is the onfa force.28 motor it's a similar setup to the picco engine.it speeds up in idle I turn the idle down and it stalls on full throttle. I've tried adjusting the high speed needle but now I'm getting bogs and fuel leaking from the exaust.another problem is the low speed needle is real tight and its in type that's in the throttle arm.any help would be great!!

 

[HPIguy]

Were you running a different plug before? I personally wouldn't change two things at once, as you don't know which one caused the issue. But I'm betting the plug is bigger change than the exhaust.

Read this, Robin is an expert at this stuff.

https://www.rcnitrotalk.com/forum/showthread.php?t=102688

 

[Nitro robbo]

Yes it is the same plug as before just new.

 

[BillyC74]

If the idle is speeding up, then your lsn is lean.