Ok so I have a good clear tach read but it seems like either one injector is firing or they are firing at the wrong time. It starts and runs but really crappy and won't idle. I'm running the stock SE setup for now with only 2 injectors so how should I have my injectors wired? Thx to muythaibxr and peejay for the help in the first thread I had on this.

 

I believe you pair the injectors off the inj1 bank, and you set 2 injectors 4 cylinders and simultaneous injection at two squirts per cycle.

That is my intuitive answer not having done a two injector setup myself.

 

That is correct, Jobro. The injectors should BOTH be run off of INJ1.

 

so should i experiment with injector pulses? or would it be because i am using a map for a 4 injector setup?

 

Wouldn't matter if you are running them simultaneous injection at two squirts per cycle, would it? If by chance you're running a V2.2 board(weak flyback circuit) and if you are not planning to run secondary injectors then you could run one inj. per bank and not have to worry if 2 low-imp. injectors(which the GSL-SE's are) are going to fry the injector driver and need added inline resistors.

 

ok ok hold up. why would they be on the same bank if they are on diff rotors? doesnt that mean they would fire at the same time and one would be either late or early?

 

Doesn't matter since the injection scheme is "batch" fired.

 

i will be adding secondaries later but for now im running the stock SE 680's. so what should i adjust? it starts and runs just not at full power kinda like it has only one rotor firing.

 

Yes, but then again, that's the way Mazda did it, too. It doesn't seem to materially affect anything at idle, which is when it'd be an issue.

Look at it this way. Okay, say you run one injector per "bank" and then run alternating squirts. Megasquirt doesn't "time" the alternations, so you'd either have both "early" or both "late" depending on where the engine was when it started.

OTOH on my P-port, I think my running issues are due to this problem, so I may have to screw around with doubling the injections at the expense of low RPM ability. So I have to idle it up at 1500-1800, big deal

 

thx for clearing that up. so what do you guys think it is?

 

How do you have the injectors connected? I'f you are using an MSQ from another rotary, and have the injectors connected one to each channel, you would probably need to turn off staging.

Tommy