Car cranks but does not start and run?

The 200 character minimum is to force you to provide enough information or detail so someone can figure out an answer. To start with, put some punctuation in that huge sentence so we know how to read it. First you said it's cranking, then you tried neutral. If it's cranking in park, what is putting it in neutral going to get you? The starter circuit is working. Next you said it "will not stay running" which implies it did start and run a few seconds before it quit. Is that right? If it runs for two seconds, then quits, it is in anti-theft mode. The additional clue is it will not run again until you turn the ignition switch all the way back to "off". Use the remote key fob "unlock" button or unlock the front door with the key to get it out of theft mode.

If the engine does not start or run at all, start by checking for spark and fuel pressure. If you have spark but no fuel pressure, suspect the fuel pump. If you have no spark, chances are the fuel pump won't be running either but that can be misleading because it will still run for one second each time you turn on the ignition switch. That will result in enough fuel pressure to make it look like the pump is running. If there is no spark there may be a related diagnostic fault code. I can describe how to read them yourself, but only codes in the Engine Computer.

Check if you have voltage to that coil pack at the dark green/orange wire with the key on run.
If not, first check the fuse #6 (hot all the time) in the PDC located under the hood, right front corner, near the battery.
You also need to check the fuse #12 (hot with key on run/start) in the junction block behind the left side of dash.
If both of these fuses are not blown and have battery voltage (twelve volts) to both sides of the fuse when hot, try a new auto shutdown relay in that PDC.

Top replacing parts for right now and test.
Let me know the voltage to that wire and when checking fuses you should use a voltmeter or at least a 12 volt test light just incase a fuse, ignition switch or wire feeding it has no power.

Check fuel pressure with a gague first autoparts rent it. Also if it fails to start if pressure ok try resetting security if it starts then have apro scan it to see what is wrong with it. Fp 44-54 psi

If there is an engine code try scanning that. I saw a problem similar to this in a liberty just recently. The car would start and run but when you tried to accelerate the car would shut down. Pulled the code it was the throttle positioning sensor. It was reading an incorrect voltage and was closing the throttle plate and shutting down the engine to prevent the alternative of opening the throttle plate all the way. Its a safety feature built into cars with electronic throttle bodies. Like Hmac300 said I would pull the code and see what it says

Good morning,

when you turn the key to on, does the security light go out after about 10 seconds or does it stay on? That will tell me if it is a security issue. If it is, do you have another key to try to start the car?

https://www.2carpros.com/articles/how-to-reset-a-security-system

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

As far as the check engine light, do you know the code? If you do not, you will need a code reader to check the code.

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

Can you hear the fuel pump run while cranking or when you turn on the key?

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

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

Roy

Hello,

This could be a problem with your Crankshaft Position Sensor (CKP). Your vehicle's CKP is used by the Power-train Control Module (PCM) or "computer" to determine the rotational speed of the crankshaft and for the misfire monitor. If the PCM isn't getting a signal from the CKP it doesn't know that the engine is cranking. I have included diagrams for both the 4.0L and 4.7L engines because you didn't specify which your vehicle had in the diagrams down below. I have also included a few links for you to go to down below as well.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Please go through these guides and get back to us with what you are able to find out please.

Thanks,
Alex
2CarPros

Hello again,

Okay, when you turn the key to start, what does your vehicle do? Does it do nothing? Do you here a click? Or does the engine crank and just not start?

Thanks,
Alex
2CarPros

Hello again,

Okay, there are three things that are needed to make an engine start. Fuel, spark (delivered at the proper time), and compression. Since it was running fine when you took it over to your buddies house, we can reasonably assume that is not that. So let's check and make sure that your vehicle is getting spark. I have included a link for you to go to down below:

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

Please go through the guide and get back to us with what you find out, please.

Thanks,
Alex
2CarPros