Hey guys I need some help! It sounds like my rotory is running on 1 rotor. No power, sounds weird, no throttle response, sounded like timing is off but I re did the timing and no change. I held it at 3K rpm and had my friend spray starter fluid in the AFM while I revved the motor, it felt and sounded like it it just came to life so I'm assuming maybe one of the rear rotor injectors is bad/clogged. I revved it to 6K and pulled the injectors accesible without having to remove the intake manifold and nothing changed...wtf???!!! Can someone help me??? I'm losing it! Anyone know how to diagnose a rotory engine that sounds like its running on 1 rotor? It slowly climbs rpms but has no power. Help!

 

You need to compression test the engine. A standard compression tester with the schraeder valve removed will work. Hold the bleeder button down, and watch the bounces. Minimum spec is 85 psi per chamber (3 per rotor).

You can also check that injectors have voltage with the engine running by back-probing the small connector on the ECU. FSM fuel and emissions section has the ECU pin-outs, and will tell you where the primary and secondary injector wires are.

If you pulled the plugs off the secondary fuel injectors while idling/free-revving the engine, it wouldn't matter. The secondaries are not used until 3800+ RPM & ~ -2 to 0 inHg manifold vacuum (load). Free-revving means almost no load on the engine.

 

Okay...compression test it is! That was my next move. I revved it above 4k and removed the injector plugs. Doing that without the motor being under a load won't matter???

 

No load, no secondaries firing.