Fuel injectors

Hi and thanks for using 2CarPros. Com.

It sounds like you may have a problem with the camshaft position sensor (CMP). The camshaft position sensors (CMP) contains a hall effect device called a sync signal generator to generate a fuel sync signal. This sync signal generator detects notches located on a tonewheel. The tonewheel is located at the front of the camshaft for the right cylinder head. As the tonewheel rotates, the notches pass through the sync signal generator. The pattern of the notches (viewed counter-clockwise from front of engine) is: 1 notch, 2 notches, 3 notches, 3 notches, 2 notches 1 notch, 3 notches and 1 notch. The signal from the CMP sensor is used in conjunction with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders. I attached a two pictures of the unit and where it is located.

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Here are the directions for removal and replacement:

The Camshaft Position Sensor (CMP) is bolted to the front/top of the right cylinder head.

REMOVAL
It is easier to remove/install sensor from under vehicle.
1. Raise and support vehicle.
2. Disconnect electrical connector at CMP sensor.
3. Remove sensor mounting bolt.
4. Carefully pry sensor from cylinder head in a rocking action with two small screwdrivers.
5. Check condition of sensor O-ring.

INSTALLATION
1. Clean out machined hole in cylinder head.
2. Apply a small amount of engine oil to sensor O-ring.
3. Install sensor into cylinder head with a slight rocking action. Do not twist sensor into position as damage to O-ring may result.

CAUTION: Before tightening sensor mounting bolt, be sure sensor is completely flush to cylinder head. If sensor is not flush, damage to sensor mounting tang may result.

4. Install mounting bolt and tighten to 12 Nm (106 in. Lbs.) Torque.
5. Connect electrical connector to sensor.
6. Lower vehicle.

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Keep in mind, a bad camshaft sensor should set a trouble code. I believe it is P0340. Check for trouble codes.

Let me know if this helps.

Take care,
Joe

Hi David. I am glad you found the problem. Interestingly, I just got home after tracing a wiring issue for a no spark. Everything checked good. I one thing I was concerned about was a common ground for all eight coil packs. It had continuity, so I assumed it was good. Wrong. I tried to power a simple 12 volts 1156 bulb using the ground, and it was so dim I could barely tell it was on. The stupid (hidden) ground connector for the coils was ready to break. Supplied a new ground and it fired right up. Ugh! Cars can be a pain. LOL Keep in mind, this was after removing the starter three times to replace the crank sensor, to try a different sensor, and then to confirm power from the PCM.

Regardless, remember that little trick if you ever have continuity but still question a ground. It sounds too simple to work, but it does.

Take care,

Joe