STRANDED.....Cranks over, but no start. No communication to ECM.

Hi, got a 2012 tundra 5.7 crew max. Wife was driving the truck one day, and got stranded. Once towed back home, found that their was no fuel pressure. I checked all the fuses and were all good. I ordered a pump and installed, same result. So I decided to check it with a scanner, and found I couldn't communicate with the ECM. I even had a local electrical shop diag. And it was pointing towards the ECM. They quoted me over $1500 for repairs and ECM replacement. So I tried tackling it myself. Got a used ECM that was badly totaled rear ended, but I did noticed that the check engine dose not turn on, when turning on the key.. In the case of the ECM, I ended up getting the same batch ECM as my original one (what are the chances). Same ID, same sticker numbers everything.
Well you guest it same problem....

So I really need some help badly. I love this truck, and don't what to loose any faith on it.

Anybody out their with any suggestion?

 

is this a flex fuel 5.7?? if it is, I believe there is a TSB referencing issues with ECM, and fuel

 

https://www.tundras.com/threads/tsb-and-warranty-question.59647/

may contain info relevant to your issue