what stops fuel injectors from firing?

ok, I reread your post. Well I guess if that's the case, that they can check out but break down when a pulse is applied, then a simulated pulse would indicate that. There's pure crank right now. No sign of the engine trying to turn over. If simulating the engine by pulsing them results in no activity, then the problem lies solely in the area of the injectors themselves. But I honestly can't see how you can measure the resistance and it checks out, but when you apply the pulse, the who thing shorts out. It would be nice if someone could explain that.

On Tuesday, November 5, 2013 7:18:02 PM UTC-7, wrote:
> ok, I reread your post. Well I guess if that's the case, that they can check out but break down when a pulse is applied, then a simulated pulse would indicate that. There's pure crank right now. No sign of the engine trying to turn over. If simulating the engine by pulsing them results in no activity, then the problem lies solely in the area of the injectors themselves. But I honestly can't see how you can measure the resistance and it checks out, but when you apply the pulse, the who thing shorts out. It would be nice if someone could explain that.

Looking at the wiring diagram, it looks to me like they are all grounded by a single driver to the ECU. If one injector shorts out, I believe all will stop firing. Also found this to confirm!

http://www.justanswer.com/chevy/1e68...park-noid.html