zena13

This is my first time so I hope I'm am doing this right.
I just put a used 13B engine in my 85 RX7 and am having trouble getting it started. This isn't the typical flooding problem but just the opposite. I have spark but no fuel. When I found that the plugs were dry I checked the fuel rail and injectors. I do have power to the rear injector when cranking the engine but none at the front. Is this normal durring startup ? I pulled the injectors from the engine block leaving them connected to the fuel rail and cranked the engine again. Even though I have power at the rear injector no fuel came out. I pulled both injectors from the rail and cranked the engine again and no fuel came out of the rail. I haven't checked it with a gage but I do have pressure in that fuel line at the rail inlet.
Any help you can offer is greatly appreciated.
Gary

hanman

Yes, check the fuel pressure over by the fuel filter. Make sure you have fuel there, then check at the primary fuel rail. This is the one under the intake. The secondary rail is the one you can see with everything back together. You should have power to one side of the injectors with the ignition turned on, car not running. This power is coming from the fuel injector resistor over by the air cleaner housing. The power that goes to the other side of the injectors comes from the ecu and pulses while the car is running. Of course you can only see this on the primaries. If you have help, have one person hold the fuel rail with the primary injectors held in place by hand, while you turn the car over. If they are working they should spray fuel all over the place, be careful.
Make sure that you know which injectors are the primaries, and which are the secondaries. Also, make sure that you have the fuel lines hooked up right. If you had them loose, it is very easy to get them hooked up backwards, then you can't get fuel to the rails.
You say that you have power to the injectors, make sure that you have fuel to them also.
hanman

zena13

I guess that I am confused by the primary and secondary rails and injectors. The ones that I am checking set under the intake on the left side of the block. Where are the other ones located ? I have no power at all when the key is on, only pulsating when I crank the engine.
Gary

HAILERS

About the used 13B. What year car did it come out of? The reason I ask is........you guessed it, the early years had low impedence and the newer cars have the high impedence. An 85 should have the low impedence and if you put high impedence injectors in with the new used engine that came out of a 88 and on car, that could be your problem.
P.S. To show what little I know, I always thougth 85's had only two injectors. Oh well.