I have a problem yesterday my rx8 was interrupted while running , suddenly turns off,the starter can not turn on the engine, the engine is stuck, try pushing in third, fourth, fifth etc Gear but the engine still attached, I hope you can help me, Thanks

 

100+k miles on original engine?

It sounds like carbon lock.

 

My car has 59k miles,
Carbon lock ? please more about it

 

Need more info about the car...year, mileage, mods (if any), driving habits, etc.

When did the last time you replaced the plugs, wires, and coils? The engine might need a compression test too. Let us know.

 

RX8 Year 2004, 59.000 miles,NOS system,
3 mounths ago replaced plugs, wires, and coils.

2 months ago in a trip the car overheat several times.

 

More than likely you have lost an apex or side seal that has gotten stuck between the rotor and the housing. The other option is one of the bearings froze on the e-shaft from oil starvation. But with the nitrous installed its more than likely an apex seal.

Those are the only 2 ways I have seen a rotary engine get stuck so to speak. There are several good options for engine builders for your 8 and I'll include myself in this category.

Good luck and keep us updated on your findings.