[Robznob11]

Sir, im not sure what you mean about communicating with ecm? The only thing the ecm does is turn it on or off. When hooked to the ecm ot will turn on 3 seconds to prime then go off untill the engine starts. If it stays running with the key on its no big deal except that it is dead heading against the regulator when the engine is not running and key is on. Now the computer is controlling the injectors and spark. If you have 58 psi at the fuel rail with the engine running the pump is not the problem. I would hook a cheap gauge to the fuel rail and check it with the engine running under a load. I had to upgrade my fuel pump after the cam. Just ideling i had 58 psi but under a load it was going down to 40 and running lean causing it to backfire through the intake.