My 2011 Mazda 6 3.7L V6 does not always crank the first time, especially after sitting overnight or a few hours. The car seems to operate perfectly other than that.
It's a push-to-start. Once I press the ignition button there is no crank, and the navigation system turns off. Sometimes, if I keep the brake held down, it would begin to crank after a delay of several seconds. Sometimes it doesn't crank at all, or maybe I am not trying long enough.
If I drive around for a while and turn it off, and turn it back on, it'll crank as usual.
I did notice that my battery was at 11.8V in the morning (which is very low) and so I had replaced it, and can confirm that the new battery is 12.5V in the mornings. The battery terminals read the battery voltage and the first ground terminal that I see from the negative terminal is also reading battery voltage.
I have also checked the ignition signal fuse and starting system fuse and they look intact.
I have also attempted to reset my ECU by unplugging the negative battery terminal, pressing on the brakes a few times and waiting more than 20 minutes, but the problem remains.
This issue popped up after installing my Injen SRI. This installation only involved the following:
- Resetting the MAF sensor
- Resetting the negative battery terminal
- Removing the airbox
I did have the MAF backwards right after installing my SRI, but have since fixed it. Not sure if that could have caused some electrical issue.
I've also confirmed that there are no vacuum leaks and that the intake is completely dry, though I don't think that either of those things would produce this symptom.
There are no codes, and as I have said, the car operates perfectly other than the no-crank issue.
What else should I be checking? If it is something wrong with the starter itself, I don't understand why my installation would have caused it.