Falha de ignição de risco

I expose my problem, the current feeding in the ignition module is cut, after checking crankshaft sensor and registering readings between 0.3 to 1.0 volt signal, it went on to check the feed of the ignition module, and after several tests it gives me 12 volt input and that is when the engine starts, hard on low when I want to accelerate a little, and it is turned off, and I check the feed again, and dead
Fuse and OK check.
Minha pergunta é porque a alimentação atual está bloqueada?

Estou ansioso para comentários do Motor de 3,4 LTS. GM. Saudações.