Originally Posted by jrosado5
replace water thermo sensor? install fuel cutoff? or do the mod on the above thread? don't know where to start!
Water thermo sensor rarely fail. Just get your meter out and read the voltage on pin 2I. When the engine is HOT the reading will be b/t 0.4 and 0.5 vdc. If it reads that, then it isn't broken at all and or the wires did not fall off it.
If the water thermo sensor was broken or the plug off it, then COLD starting would be difficult. Why? Because the ECU defaults to 176* when that sensor is broken/off. That high a temp would result in a much smaller amount of fuel being delivered during START than would be with the sensor working right.
Frankly, 160,000 miles is a lot for a rotary engine and I wouldn't be surprised if the compression was not somewhat low. High milage RX bother me. I've seen worn out apex seals. At least a piston engine will knock or make some detectable noise prior to a piston going out/valve going out.
I'd either make a fuel cut switch or make a switch tied to pin 3B at the ECU. One or the other. The fuel cut switch is the least desirable of the two.
Or you could have a leaking injector. Which one? Got me. Mazdatrix makes a outfit that depressurizes the fuel rail when the engine is off. That is to keep the injector from dripping fuel into the rotor which causes flooding. There's cheaper ways to do what they sell for $$$$$$. A number 40 or smaller hole drilled in the fuel pump's outlet line will do the same thing and can be *undone* if the hole is too big or not wanted lated by simply putting a small hose clamp over the hole you drilled to stop it up.