Rotary Engine Flooding

Fuel injected rotary powered cars are prone to flooding by nature. It can be as simple as old plugs or ignition wires, to as complex as intermittent EFI computer malfunctions.

The most common problem is not really a defective part or failure, but a "bug" found in the EFI system. If the car is started, allowed to run for only a few minutes, turned off, then attempted to restart later, it will likely flood. Even if everything else on the car is perfect, this problem cannot be explained, or "fixed", just have to learn to avoid the situation. Every time the car is started, must allow to fully warm up before turning. Common story is moving the car from driveway to garage, only running for few seconds, next morning cranks, but not starting.

Mechanical problems such as low compression due to high mileage or dirty/leaking fuel injectors contribute to the problem. Electrical problems such as slow cranking speed due to weak alternator, bad battery/ground, or starter can result in too much fuel being injected, saturating the spark plugs. If an engine has been severely overheated, may be inhaling coolant into cylinders, characterized by white smoke on startup. Higher mileage models may have weak oil seals, causing oil to seep into cylinder while car is sitting, and smoking (blue) when started or held at continuous high rpms for several seconds. Only repair for both is engine replacement or overhaul. On automatic transmission cars, similar symptoms appear when the vacuum modulator diaphragm goes bad, resulting in ATF inhaled into the engine under high vacuum situations.