We are having some horrible problems with our EK6 built 91 track car. It WILL not start. We have fuel pressure, spark, new tested plugs. The last thing is to swap injectors. We think we blew the primary stock 550's. The question is, What impedance injectors do I need to run?

I have low and high 460,550, and 720's to test. I just dont want to screw up the ecu.

 

You can run either impedance, you just need to tell the ECU.

Is the haltech seeing RPM?

 

Well, is this NA or turbo? Also, what kind of porting are we talking about? are your plugs wet after a few attempts at cranking? What kind of millisecond values are you seeing at cranking?

You can use both low and high impedance, and in the software you can set the current limit on the injector drivers, 8A if its low imp. or disabled if its high imp.