I have a LT8 that was running perfectly fine until about a year ago.

It just stopped starting. I know im getting fuel at the rail, and spark.

Im trying to figure out what the voltage should be at the injectors to see if maybe my injector drivers are toast.

When the ECU off, Im getting 12 volts....on 3 of the 4 outputs to the injectors. The leading primary is only at like 4 volts.

When I turn the ECU on, its the same, when cranking, it is the same. I wouldnt think there should be voltage going through them with the ECU off?

Can anyone point me in the right direction?

 

Well, after doing some more research and emailing Microtech, come to find out the wiring is okay to the injector. On all 4 im getting 12v on one side, nothing on the other.

I ended up testing the resistance on my primaries, on is fine around 12.5, and the other one, i get nothing. Is it stuck open?

My other question would be, does the Microtech only fire the primaries during starting? Would one being bad cause the car not to start? Seems to me i would start and run like ****?