Hello everyone. I am new to the rotary motor, and have a few questions. first off, I have what we believe to be, is a 1986 13b. the motor is in my sand rail. I got the motor from a guy that was going to put it in his sand rail, but once he saw all the wires, he decided not to. My friends dad was a mechanic formazda for a long time, but left mazda before the fuel injection came out, so he has helped me with the basics, but there is still a bit that he does not know. when I got the motor, the wiring harness was cut in half right between the motor, and the computer. I spent a few days rounding up factory schematics, and got all of thewiring hooked up (Im 99% sure the wiring is correct). I amvery competant with my electronics, and wiring skills. here is what I have, there have been several threads talking about no spark, yet I haven't found one that ends with the car running. I am not getting any spark from my coils. I have checked all 4. it has new wires, everything is grounded, and it is al grounded to the motor. I have tested the CAS , and it checks out perfect. I used my logic probe test light, on all 4 wires going into the trailing coil, and gould not pick up any signal that it was pulsing, I tryed the two wires on the leading coil, but the same thing. should I see the negetive pulses on those wires with my anlogic probe? does the computer send a low voltage negative signal to the ignitors to tell them when to fire, or is that signal sent from the ignitors? My logic probe flashes when I hook it into the injector wires, so that leeds me to believe that the injectors are fireing propperly. does the CAS tell the injectors when to fire? if not, then what does. I am not sure were to go from here. I have checked everything I could think of, and no luck. PLEASE HELP ME!!!

thanks

Jake

 

do you get it to crank? if no then does your gauge cluster work? if that doesnt work but your headlights do then you might have some how blown your main 80 amp fuse

 

all the fuses are good, the motor isn't in a car, its in a sand rail. there is no instrument cluster this is all hooked up to a volkswagen tranny. the starter is is directly wired to a push button. there is one wire that runs from the computer to the starter as shown from the wiring schematics. I also forgot to mention that I put a new computer in the rail, and it didn't change a thing. the main thing I am wondering is if the CAS tells the injectors when to spark, or if it only runs the spark. I am trying to rule out the cas. it tested good, but I have heard a couple times that people test them and they test fine but find out later that they need replaced.

 

may be you have bad coils and or ignitors

 

does anyone else have any ideas?