I have a HPI G3.0 engine in a MT2 that's doing some weird things. When cold, it has plenty of pinch, but once warm, it acts like a worn out engine. It doesn't want to idle when warm, and once warm almost refuses to restart. I'm pretty good at tuning these engines, but I have never seen one do this before. Has anyone else run into this? It was used when I got it, so I don't know how it's been treated before I got it.
I'm planning on just doing a rebuild(don't have enough for a new engine) and starting from scratch, but would like to know why it's doing this. If anything, it wants to run overly rich once warm. I never let these engines run lean or with a lack of lubrication(if I don't see some smoke, I richen it up ASAP).
Thanks.