Engine cranks will not start

How new is the battery? When you are checking voltage at the DLC and you only have 9.8 volts on a power wire that should have battery voltage then that points to a battery issue.

Clearly if the battery tests okay using this load test then we have resistance in the circuit somewhere.

https://www.2carpros.com/articles/car-battery-load-test

However, this is not likely if this vehicle was running one day and not the next. So that begs the question of, is this a new issue or is this something that we have been chasing for a while? Any recent repairs that would be related? Basically, when did this start?

Below is the wiring diagram that will show that this pin is a direct feed from fuse 25 which is hot at all times.

Also, what happens when you turn the engine over? You said it cranks but is this is strong crank?

I suspect if the battery is the issue that the fuel pump has the same lower voltage and if it does then it will supply fuel put not the correct pressure. So we should check the pressure to confirm this.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let's start with this info and go from there.

Thanks

The battery is brand new and one day it was running and running fine and it just quit and then it cranks but wont fire. could it be the crank shaft position sensor?

It would not be the crank sensor if you have spark. So we are missing something on one of these tests. However, if it doesn't have spark then the crank sensor would be the leading cause.

In order to start the engine you need fuel, spark, air, and compression.

So when you say you have spark, how did you test this? You have pulse on the injector so I assume you used a test light to see if it was pulsing?

If the spark is blue and you actually have fuel pressure then this would be a compression issue. However, if the engine was running fine then it is not, then compression is highly unlikely.

Which takes us back to ruling out one of the other questions we still have.

First is what is the pressure? Just because the injectors are pulsing and there is fuel there, doesn't mean the pressure is enough to run the engine.

Basically we need to start narrowing down these items until we find more info to go on.

Also, we need to check for codes even if the check engine light is not on.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Thanks