2014 Mazda 6 - turns over and fires and dies. Battery is strong - Key FOB is good and green key is illuminated on dash - I want to test my coil packs for a misfire next. I hooked up to an OBD2 (cheap one) and it did not populate a code. I believe that I am hearing the fuel pump priming with a...

I have a 2004 Mazda 6s, 3.0 v6 and about two weeks ago i got in my tried to start it but it actted like it had a too low, or dead battery. So i got a jump and it started just fine. Later that evening, same thing happened so i hooked up the jumper cables to a truck, tried to start it but no go...