Cranks over will not start

Hi David,

Normally, you need three things to start an engine. Fuel, spark, and combustion. In addition to that is combustion at the right time, is needed. I suspect you have a timing issue.

Do you know if you have any codes?

This engine is called a World engine and it has what are called cam phasers. In other words it is a variable valve timing. Meaning the phaser will move the intake and exhaust cams to optimize engine timing in any given situation.

Was anything done to the engine timing recently?

https://www.2carpros.com/articles/how-camshaft-variable-valve-timing-works

Will the engine start if you unplug the cam sensor and try to start it?

In this engine we need to see a good crank sensor signal in order to know the engine position to start the engine. However, if the cam phaser is malfunctioning, it may be throwing off timing so that it does not start. When you replaced the sensor, it may have had to learn the new sensor and this is why it started. Unplugging the sensor should cause the phaser to go to what is called lock pin or base timing and stay there.

Just check codes before you try to start it with it unplugged because you will throw a code and that could mislead us.

Lastly, just be aware of excessive cranking with fuel going through the engine. Not only will that foul the plugs and cause a no start, but it can hurt the exhaust. Even though the plugs are new, if you have been cranking it a lot, you may want to pull them out and see if they are fouled.

Let me know about the codes and then try to start it with the cam sensor unplugged and we can go from there. Thanks

Hello,

This could be a problem with your vehicle's Crankshaft Position Sensor (CKP). Your vehicle's Power-train Control Module (PCM) uses the signal from both the Camshaft Position Sensor (CMP) as well as the CKP to determine when to fire not only the spark plugs, but the furl injectors. Without the CKP signal your vehicle's PCM might fire these components, but it won't know the proper time, therefore your engine will not start. I have included a couple of links below for you to go to:

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

I have also included in the diagrams down below the description of your vehicle's CKP circuit as well as it's location in the diagrams down below. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

This post was from over a year ago so I doubt they will respond. However, if you want to get a new post started with your issue, we can help find a solution for you.

Hopefully they will respond with what happened but if not here is a link to get the new post started.

https://www.2carpros.com/questions/new

Thanks