Engine coolant temperature sensor location

Hi,

On this vehicle, there is a cylinder head temperature sensor. It is located on the driver's side front cylinder head below the intake. I attached a pic of its location. The directions indicate to remove the upper intake manifold to replace it, but if you remove the alternator, chances are you can get to it.

Now, before you go crazy replacing it, do you have a live data scanner? If the sensor is causing the misfire when cold and there are no codes, you can check to see what the sensor is indicating the temp to be (maybe too hot or too cold). Or, you can tell by the fuel trims if they are too rich or lean.

It's just a thought. May save you a few bucks and a headache. Keep in mind, if it hasn't had new plugs, they may be a possible cause as well.

Let me know if this helps or if you have other questions.

Take care,
Joe

Hi,
:
Just to confirm, it is an 03 with the 5.4L. That is what my manual is telling me as far as location. Are you sure it isn't broken off? I've seen that as well.

As far as the starting, when it cuts out, does the start just quit or can you hear it trying to turn?

Joe

Hi,

Try this. In the under hood fuel box, locate the starter relay. Switch it with a different relay in the box that has the same part number and see if that changes it.

I attached a pic of the relay location.

Let me know.

Joe