Car will not start when engine is hot

Hi and thanks for using 2CarPros.

Often times when an engine fails to start when it is hot, the crankshaft position sensor is the problem. First, take a look through this link. It discusses symptoms related to a bad sensor. There are other symptoms listed, but I want you to understand the underlying cause of a no start when hot when it is related.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Here is a link that shows in general how one is replaced:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Let me know if this helps. Also, if you want to easily check if the sensor is a prime suspect, check the engine for ignition spark when it won't start. Here is a link that shows that process:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Take care,
Joe

Welcome back:

I don't give up too easily. What I need to know next is this. When the engine won't start, you need to check for both spark and fuel to the engine. One will be missing and causing the problem.

The easiest way to do this is by seeing if it will start for a couple seconds using starting fluid. If it does, it is a fuel related issue. If it doesn't start, then we need to suspect there is no spark from the ignition system. Once that is determined, we've started to narrow down the cause.

If you don't want to try using starting fluid, here are the lings to check fuel pressure and ignition spark.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

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

As I said, one we determine which one is causing the no start condition, we can then focus on specific things related.

Also, here is a link that discusses the most common causes of a crank no start condition. Take a look through it to see if anything is helpful.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Also, if you have or have access to a live data scanner, you can check if there is an RPM signal when cranking the engine. If there is none, it's ignition related.

Let me know what you find and we'll get it running.

Take care,
Joe