Just wondering, ran the car and after about a few minutes of runnnig I'd say about 5, I get code EST grounded, I am running an AEM low impedance injector driver, if the pcm sees the big injectors will it throw this code in particular?

 

Basically car runs at base timing sometimes, and I get that code during start up, sometimes it's not there, but mostl of the time it is, I'm wondering can an Optispark going bad cause that as well?