Timing chain adjustment, codes P0344 and P0137

Hi,

If you set the timing up as shown in the test then most likely you may have a damaged sprocket on the left intake cam. The only way it is going to actually jump a tooth is if the piston/valve made contact and caused it to jump or the sprocket is worn and allowing the chain to just like a bicycle chain does when you put to much force on it.

I included the procedure for replacing the timing chain so that you have all of the correct marking. If you set it up wrong then when you check it, it will look like the tooth jumped but in reality it is just set up wrong.

There is a very important warning that is not included in this repair procedure and that is, if the timing marks are off by two teeth and you run the engine, you are likely going to damage the engine because this is not a free wheeling engine which means the piston and valve will contact if not timed properly.

The P0137 is an o2 sensor code. I included that diagram here but the P0344 is a cam code and is related to the issue you are finding. This is either a sensor, wiring or circuit issue or the tone wheel that is on the sprocket is damaged. However, if you have if mistimed then it will think the tone wheel is damaged.

Looks like the best thing to do is remove the cam sprockets and inspect them for any wear and inspect the tone wheel for damage.

Please tell me if you need more assistance and I will be happy to help out. Thanks

This means that the engine controller thinks that the timing is set to -64 degrees. This is an indicator to the hard starting. If this is what it thinks the timing is set to then it is not firing the plugs or injectors at the correct time. You need to go through the testing for the P0344 because this is related to the -64 that the controller is seeing. Either the timing is truly off or the sensor or wiring is the issue.

Okay. You will have to set the cams and crank up as it shows in the attachments that I provided earlier. I have not seen something like this that it jumps timing when all is new and the engine didn't even run.

Just pay close attention to the crank because the dot on the sprocket looks like it has a link of the chain in between the arrow and dot. If this is not the same, then it could be a tooth off. By the time the cam turns over it will be two teeth off.